231011322102 has 96 divisors (see below), whose sum is σ = 561114721440. Its totient is φ = 68071311360.

The previous prime is 231011322089. The next prime is 231011322109. The reversal of 231011322102 is 201223110132.

231011322102 is a `hidden beast` number, since 231 + 0 + 11 + 322 + 102 = 666.

231011322102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231011322109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13830468 + ... + 13847160.

It is an arithmetic number, because the mean of its divisors is an integer number (5844945015).

Almost surely, 2^231011322102 is an apocalyptic number.

231011322102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 231011322102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280557360720).

231011322102 is an abundant number, since it is smaller than the sum of its proper divisors (330103399338).

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

231011322102 is a wasteful number, since it uses less digits than its factorization.

231011322102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18638 (or 18635 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231011322102 its reverse (201223110132), we get a palindrome (432234432234).

The spelling of 231011322102 in words is "two hundred thirty-one billion, eleven million, three hundred twenty-two thousand, one hundred two".