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10101010212 = 2232377583341
BaseRepresentation
bin10010110100001000…
…10010111100100100
3222001221211111002100
421122010102330210
5131141324311322
64350151412100
7505212112236
oct113204227444
928057744070
1010101010212
114313836527
121b5a984030
13c4c8c5a27
146bb738256
153e1bb1dac
hex25a112f24

10101010212 has 36 divisors (see below), whose sum is σ = 26223196636. Its totient is φ = 3276002880.

The previous prime is 10101010201. The next prime is 10101010243. The reversal of 10101010212 is 21201010101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8533325376 + 1567684836 = 92376^2 + 39594^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 10101010194 and 10101010203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3790339 + ... + 3793002.

Almost surely, 210101010212 is an apocalyptic number.

10101010212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10101010212 is an abundant number, since it is smaller than the sum of its proper divisors (16122186424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10101010212 is a wasteful number, since it uses less digits than its factorization.

10101010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7583388 (or 7583383 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 10101010212 its reverse (21201010101), we get a palindrome (31302020313).

The spelling of 10101010212 in words is "ten billion, one hundred one million, ten thousand, two hundred twelve".

Divisors: 1 2 3 4 6 9 12 18 36 37 74 111 148 222 333 444 666 1332 7583341 15166682 22750023 30333364 45500046 68250069 91000092 136500138 273000276 280583617 561167234 841750851 1122334468 1683501702 2525252553 3367003404 5050505106 10101010212