231021123120 has 120 divisors (see below), whose sum is σ = 816679983600. Its totient is φ = 58363227648.

The previous prime is 231021123107. The next prime is 231021123169. The reversal of 231021123120 is 21321120132.

231021123120 is a `hidden beast` number, since 2 + 310 + 211 + 23 + 120 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a junction number, because it is equal to n+sod(n) for n = 231021123093 and 231021123102.

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, 8430075 + ... + 8457434.

It is an arithmetic number, because the mean of its divisors is an integer number (6805666530).

Almost surely, 2^231021123120 is an apocalyptic number.

231021123120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231021123120 is an abundant number, since it is smaller than the sum of its proper divisors (585658860480).

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

231021123120 is a wasteful number, since it uses less digits than its factorization.

231021123120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16887547 (or 16887538 counting only the distinct ones).

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

Adding to 231021123120 its reverse (21321120132), we get a palindrome (252342243252).

The spelling of 231021123120 in words is "two hundred thirty-one billion, twenty-one million, one hundred twenty-three thousand, one hundred twenty".