31122130312020 has 96 divisors (see below), whose sum is σ = 95071903266816. Its totient is φ = 7544128579200.

The previous prime is 31122130311949. The next prime is 31122130312057. The reversal of 31122130312020 is 2021303122113.

It is a congruent number.

It is an unprimeable number.

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, 5960985 + ... + 9888255.

It is an arithmetic number, because the mean of its divisors is an integer number (990332325696).

Almost surely, 2^{31122130312020} is an apocalyptic number.

31122130312020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31122130312020 is an abundant number, since it is smaller than the sum of its proper divisors (63949772954796).

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

31122130312020 is a wasteful number, since it uses less digits than its factorization.

31122130312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939301 (or 3939299 counting only the distinct ones).

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

Adding to 31122130312020 its reverse (2021303122113), we get a palindrome (33143433434133).

The spelling of 31122130312020 in words is "thirty-one trillion, one hundred twenty-two billion, one hundred thirty million, three hundred twelve thousand, twenty".