100121021112 has 64 divisors (see below), whose sum is σ = 286165440000. Its totient is φ = 28595468160.

The previous prime is 100121021111. The next prime is 100121021131. The reversal of 100121021112 is 211120121001.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121021111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353437 + ... + 570227.

It is an arithmetic number, because the mean of its divisors is an integer number (4471335000).

Almost surely, 2^100121021112 is an apocalyptic number.

100121021112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100121021112 is an abundant number, since it is smaller than the sum of its proper divisors (186044418888).

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

100121021112 is a wasteful number, since it uses less digits than its factorization.

100121021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219556 (or 219552 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100121021112 its reverse (211120121001), we get a palindrome (311241142113).

The spelling of 100121021112 in words is "one hundred billion, one hundred twenty-one million, twenty-one thousand, one hundred twelve".