31001231010020 has 24 divisors (see below), whose sum is σ = 65734649058624. Its totient is φ = 12280099273056.

The previous prime is 31001231009933. The next prime is 31001231010037. The reversal of 31001231010020 is 2001013210013.

It is a super-2 number, since 2×31001231010020² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31001231009977 and 31001231010004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7524568574 + ... + 7524572693.

It is an arithmetic number, because the mean of its divisors is an integer number (2738943710776).

Almost surely, 2^{31001231010020} is an apocalyptic number.

It is an amenable number.

31001231010020 is an abundant number, since it is smaller than the sum of its proper divisors (34733418048604).

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

31001231010020 is a wasteful number, since it uses less digits than its factorization.

31001231010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15049141379 (or 15049141377 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31001231010020 its reverse (2001013210013), we get a palindrome (33002244220033).

The spelling of 31001231010020 in words is "thirty-one trillion, one billion, two hundred thirty-one million, ten thousand, twenty".