31323111302020 has 48 divisors (see below), whose sum is σ = 65881321809408. Its totient is φ = 12509673552000.

The previous prime is 31323111301991. The next prime is 31323111302039. The reversal of 31323111302020 is 2020311132313.

It is a super-2 number, since 2×31323111302020² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323111301982 and 31323111302000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65444017 + ... + 65920903.

It is an arithmetic number, because the mean of its divisors is an integer number (1372527537696).

Almost surely, 2^{31323111302020} is an apocalyptic number.

It is an amenable number.

31323111302020 is an abundant number, since it is smaller than the sum of its proper divisors (34558210507388).

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

31323111302020 is a wasteful number, since it uses less digits than its factorization.

31323111302020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482020 (or 482018 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31323111302020 its reverse (2020311132313), we get a palindrome (33343422434333).

The spelling of 31323111302020 in words is "thirty-one trillion, three hundred twenty-three billion, one hundred eleven million, three hundred two thousand, twenty".