231312212020 has 24 divisors (see below), whose sum is σ = 485772825384. Its totient is φ = 92521612416.

The previous prime is 231312212003. The next prime is 231312212039. The reversal of 231312212020 is 20212213132.

It can be written as a sum of positive squares in 4 ways, for example, as 14832316944 + 216479895076 = 121788^2 + 465274^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421894 + ... + 800386.

It is an arithmetic number, because the mean of its divisors is an integer number (20240534391).

Almost surely, 2^231312212020 is an apocalyptic number.

231312212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231312212020 is an abundant number, since it is smaller than the sum of its proper divisors (254460613364).

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

231312212020 is a wasteful number, since it uses less digits than its factorization.

231312212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409059 (or 409057 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 231312212020 its reverse (20212213132), we get a palindrome (251524425152).

The spelling of 231312212020 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred twelve thousand, twenty".