231212100112 has 120 divisors (see below), whose sum is σ = 533685907392. Its totient is φ = 96703891200.

The previous prime is 231212100083. The next prime is 231212100127. The reversal of 231212100112 is 211001212132.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54645037 + ... + 54649267.

Almost surely, 2^231212100112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231212100112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266842953696).

231212100112 is an abundant number, since it is smaller than the sum of its proper divisors (302473807280).

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

231212100112 is a wasteful number, since it uses less digits than its factorization.

231212100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5917 (or 5904 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 231212100112 its reverse (211001212132), we get a palindrome (442213312244).

The spelling of 231212100112 in words is "two hundred thirty-one billion, two hundred twelve million, one hundred thousand, one hundred twelve".