231323131212102 has 96 divisors (see below), whose sum is σ = 528513388129440. Its totient is φ = 74996281607040.

The previous prime is 231323131212083. The next prime is 231323131212119. The reversal of 231323131212102 is 201212131323132.

231323131212102 is a `hidden beast` number, since 2 + 3 + 1 + 3 + 231 + 312 + 12 + 102 = 666.

It is a super-2 number, since 2×231323131212102² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202060368 + ... + 203201964.

It is an arithmetic number, because the mean of its divisors is an integer number (5505347793015).

Almost surely, 2^{231323131212102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231323131212102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264256694064720).

231323131212102 is an abundant number, since it is smaller than the sum of its proper divisors (297190256917338).

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

231323131212102 is a wasteful number, since it uses less digits than its factorization.

231323131212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144423 (or 1144380 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 231323131212102 its reverse (201212131323132), we get a palindrome (432535262535234).

The spelling of 231323131212102 in words is "two hundred thirty-one trillion, three hundred twenty-three billion, one hundred thirty-one million, two hundred twelve thousand, one hundred two".