10010101212 has 72 divisors (see below), whose sum is σ = 26055338400. Its totient is φ = 3238005888.

The previous prime is 10010101201. The next prime is 10010101217. The reversal of 10010101212 is 21210101001.

It is a happy number.

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 = 10010101194 and 10010101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10010101217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508489 + ... + 527807.

It is an arithmetic number, because the mean of its divisors is an integer number (361879700).

Almost surely, 2^10010101212 is an apocalyptic number.

10010101212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10010101212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13027669200).

10010101212 is an abundant number, since it is smaller than the sum of its proper divisors (16045237188).

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

10010101212 is a wasteful number, since it uses less digits than its factorization.

10010101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19755 (or 19750 counting only the distinct ones).

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

Adding to 10010101212 its reverse (21210101001), we get a palindrome (31220202213).

The spelling of 10010101212 in words is "ten billion, ten million, one hundred one thousand, two hundred twelve".