31430212112020 has 48 divisors (see below), whose sum is σ = 66166625096208. Its totient is φ = 12541033518080.

The previous prime is 31430212112017. The next prime is 31430212112027. The reversal of 31430212112020 is 2021121203413.

It can be written as a sum of positive squares in 8 ways, for example, as 1483904040336 + 29946308071684 = 1218156^2 + 5472322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31430212111982 and 31430212112000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430212112027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15545814 + ... + 17450866.

It is an arithmetic number, because the mean of its divisors is an integer number (1378471356171).

Almost surely, 2^{31430212112020} is an apocalyptic number.

It is an amenable number.

31430212112020 is an abundant number, since it is smaller than the sum of its proper divisors (34736412984188).

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

31430212112020 is a wasteful number, since it uses less digits than its factorization.

31430212112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907100 (or 1907098 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 31430212112020 its reverse (2021121203413), we get a palindrome (33451333315433).

The spelling of 31430212112020 in words is "thirty-one trillion, four hundred thirty billion, two hundred twelve million, one hundred twelve thousand, twenty".