231311222031000 has 128 divisors (see below), whose sum is σ = 722094434193600. Its totient is φ = 61648512076800.

The previous prime is 231311222030981. The next prime is 231311222031013. The reversal of 231311222031000 is 130222113132.

It is a super-2 number, since 2×231311222031000² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16182397 + ... + 26916396.

Almost surely, 2^{231311222031000} is an apocalyptic number.

231311222031000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231311222031000 is an abundant number, since it is smaller than the sum of its proper divisors (490783212162600).

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

231311222031000 is a wasteful number, since it uses less digits than its factorization.

231311222031000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43100606 (or 43100592 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 231311222031000 its reverse (130222113132), we get a palindrome (231441444144132).

The spelling of 231311222031000 in words is "two hundred thirty-one trillion, three hundred eleven billion, two hundred twenty-two million, thirty-one thousand".