231311120102 has 4 divisors (see below), whose sum is σ = 346966680156. Its totient is φ = 115655560050.

The previous prime is 231311120087. The next prime is 231311120141. The reversal of 231311120102 is 201021113132.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57827780024 + ... + 57827780027.

It is an arithmetic number, because the mean of its divisors is an integer number (86741670039).

Almost surely, 2^231311120102 is an apocalyptic number.

231311120102 is a deficient number, since it is larger than the sum of its proper divisors (115655560054).

231311120102 is a wasteful number, since it uses less digits than its factorization.

231311120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115655560053.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 231311120102 its reverse (201021113132), we get a palindrome (432332233234).

The spelling of 231311120102 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred twenty thousand, one hundred two".