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10212121112 = 231276515139
BaseRepresentation
bin10011000001011000…
…01001101000011000
3222100200220111120212
421200230021220120
5131403300333422
64405201110252
7511031411564
oct114054115030
928320814525
1010212121112
114370526816
121b90028388
13c6992991b
146cc3bc6a4
153eb80d9e2
hex260b09a18

10212121112 has 8 divisors (see below), whose sum is σ = 19147727100. Its totient is φ = 5106060552.

The previous prime is 10212121111. The next prime is 10212121123. The reversal of 10212121112 is 21112121201.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×102121211122 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212121111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638257562 + ... + 638257577.

Almost surely, 210212121112 is an apocalyptic number.

It is an amenable number.

10212121112 is a deficient number, since it is larger than the sum of its proper divisors (8935605988).

10212121112 is a wasteful number, since it uses less digits than its factorization.

10212121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276515145 (or 1276515141 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10212121112 its reverse (21112121201), we get a palindrome (31324242313).

The spelling of 10212121112 in words is "ten billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twelve".

Divisors: 1 2 4 8 1276515139 2553030278 5106060556 10212121112