231312322311020 has 96 divisors (see below), whose sum is σ = 501503954031360. Its totient is φ = 89573777821440.

The previous prime is 231312322310947. The next prime is 231312322311023. The reversal of 231312322311020 is 20113223213132.

It is a super-2 number, since 2×231312322311020² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231312322311023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280013390 + ... + 280838250.

It is an arithmetic number, because the mean of its divisors is an integer number (5223999521160).

Almost surely, 2^{231312322311020} is an apocalyptic number.

231312322311020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231312322311020 is an abundant number, since it is smaller than the sum of its proper divisors (270191631720340).

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

231312322311020 is a wasteful number, since it uses less digits than its factorization.

231312322311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828543 (or 828541 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 231312322311020 its reverse (20113223213132), we get a palindrome (251425545524152).

The spelling of 231312322311020 in words is "two hundred thirty-one trillion, three hundred twelve billion, three hundred twenty-two million, three hundred eleven thousand, twenty".