231020123202 has 48 divisors (see below), whose sum is σ = 546111663552. Its totient is φ = 69997880160.

The previous prime is 231020123179. The next prime is 231020123219. The reversal of 231020123202 is 202321020132.

231020123202 is a `hidden beast` number, since 2 + 310 + 20 + 12 + 320 + 2 = 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 23 ways as a sum of consecutive naturals, for example, 1743228 + ... + 1871064.

It is an arithmetic number, because the mean of its divisors is an integer number (11377326324).

Almost surely, 2^231020123202 is an apocalyptic number.

231020123202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231020123202 is an abundant number, since it is smaller than the sum of its proper divisors (315091540350).

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

231020123202 is a wasteful number, since it uses less digits than its factorization.

231020123202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136983 (or 136980 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 231020123202 its reverse (202321020132), we get a palindrome (433341143334).

The spelling of 231020123202 in words is "two hundred thirty-one billion, twenty million, one hundred twenty-three thousand, two hundred two".