231323220102 has 32 divisors (see below), whose sum is σ = 498595638240. Its totient is φ = 71124802560.

The previous prime is 231323220101. The next prime is 231323220113. The reversal of 231323220102 is 201022323132.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323220101) 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, 966027 + ... + 1181462.

It is an arithmetic number, because the mean of its divisors is an integer number (15581113695).

Almost surely, 2^231323220102 is an apocalyptic number.

231323220102 is an abundant number, since it is smaller than the sum of its proper divisors (267272418138).

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

231323220102 is a wasteful number, since it uses less digits than its factorization.

231323220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148888.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231323220102 its reverse (201022323132), we get a palindrome (432345543234).

The spelling of 231323220102 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred twenty thousand, one hundred two".