31401012213020 has 48 divisors (see below), whose sum is σ = 67217401788768. Its totient is φ = 12319819641600.

The previous prime is 31401012212971. The next prime is 31401012213047. The reversal of 31401012213020 is 2031221010413.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31401012212983 and 31401012213001.

It is a congruent number.

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, 72424307 + ... + 72856586.

It is an arithmetic number, because the mean of its divisors is an integer number (1400362537266).

Almost surely, 2^{31401012213020} is an apocalyptic number.

It is an amenable number.

31401012213020 is an abundant number, since it is smaller than the sum of its proper divisors (35816389575748).

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

31401012213020 is a wasteful number, since it uses less digits than its factorization.

31401012213020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145281110 (or 145281108 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31401012213020 its reverse (2031221010413), we get a palindrome (33432233223433).

The spelling of 31401012213020 in words is "thirty-one trillion, four hundred one billion, twelve million, two hundred thirteen thousand, twenty".