100112312121 has 16 divisors (see below), whose sum is σ = 141244170240. Its totient is φ = 62897780880.

The previous prime is 100112312107. The next prime is 100112312143. The reversal of 100112312121 is 121213211001.

It is not a de Polignac number, because 100112312121 - 2⁵ = 100112312089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100112312121.

It is not an unprimeable number, because it can be changed into a prime (100112312161) 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, 4586905 + ... + 4608678.

It is an arithmetic number, because the mean of its divisors is an integer number (8827760640).

Almost surely, 2^100112312121 is an apocalyptic number.

It is an amenable number.

100112312121 is a deficient number, since it is larger than the sum of its proper divisors (41131858119).

100112312121 is a wasteful number, since it uses less digits than its factorization.

100112312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195796.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 100112312121 its reverse (121213211001), we get a palindrome (221325523122).

The spelling of 100112312121 in words is "one hundred billion, one hundred twelve million, three hundred twelve thousand, one hundred twenty-one".