231011302120 has 32 divisors (see below), whose sum is σ = 519796951200. Its totient is φ = 92400694848.

The previous prime is 231011302079. The next prime is 231011302129. The reversal of 231011302120 is 21203110132.

It is a junction number, because it is equal to n+sod(n) for n = 231011302094 and 231011302103.

It is not an unprimeable number, because it can be changed into a prime (231011302129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984427 + ... + 1196293.

It is an arithmetic number, because the mean of its divisors is an integer number (16243654725).

Almost surely, 2^231011302120 is an apocalyptic number.

231011302120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231011302120 is an abundant number, since it is smaller than the sum of its proper divisors (288785649080).

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

231011302120 is a wasteful number, since it uses less digits than its factorization.

231011302120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239137 (or 239133 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 231011302120 its reverse (21203110132), we get a palindrome (252214412252).

The spelling of 231011302120 in words is "two hundred thirty-one billion, eleven million, three hundred two thousand, one hundred twenty".