231123020402 has 32 divisors (see below), whose sum is σ = 365058099072. Its totient is φ = 109531590784.

The previous prime is 231123020369. The next prime is 231123020407. The reversal of 231123020402 is 204020321132.

It is not an unprimeable number, because it can be changed into a prime (231123020407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3477293 + ... + 3543135.

It is an arithmetic number, because the mean of its divisors is an integer number (11408065596).

Almost surely, 2^231123020402 is an apocalyptic number.

231123020402 is a deficient number, since it is larger than the sum of its proper divisors (133935078670).

231123020402 is a wasteful number, since it uses less digits than its factorization.

231123020402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66562.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 231123020402 its reverse (204020321132), we get a palindrome (435143341534).

The spelling of 231123020402 in words is "two hundred thirty-one billion, one hundred twenty-three million, twenty thousand, four hundred two".