231231212100000 has 864 divisors, whose sum is σ = 946077935886720. Its totient is φ = 52472413440000.

The previous prime is 231231212099971. The next prime is 231231212100067. The reversal of 231231212100000 is 1212132132.

231231212100000 is a `hidden beast` number, since 231 + 2 + 312 + 121 + 0 + 0 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 875567974 + ... + 875832026.

It is an arithmetic number, because the mean of its divisors is an integer number (1094997610980).

Almost surely, 2^{231231212100000} is an apocalyptic number.

231231212100000 is a gapful number since it is divisible by the number (20) 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 231231212100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473038967943360).

231231212100000 is an abundant number, since it is smaller than the sum of its proper divisors (714846723786720).

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

231231212100000 is a wasteful number, since it uses less digits than its factorization.

231231212100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264240 (or 264209 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231231212100000 its reverse (1212132132), we get a palindrome (231232424232132).

The spelling of 231231212100000 in words is "two hundred thirty-one trillion, two hundred thirty-one billion, two hundred twelve million, one hundred thousand".