31020322130120 has 32 divisors (see below), whose sum is σ = 69795924964920. Its totient is φ = 12408093265920.

The previous prime is 31020322130101. The next prime is 31020322130137. The reversal of 31020322130120 is 2103122302013.

It can be written as a sum of positive squares in 4 ways, for example, as 24227324359876 + 6792997770244 = 4922126^2 + 2606338^2 .

It is a super-2 number, since 2×31020322130120² (a number of 28 digits) contains 22 as substring.

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 = 31020322130092 and 31020322130101.

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, 16422854 + ... + 18214026.

Almost surely, 2^{31020322130120} is an apocalyptic number.

It is an amenable number.

31020322130120 is an abundant number, since it is smaller than the sum of its proper divisors (38775602834800).

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

31020322130120 is a wasteful number, since it uses less digits than its factorization.

31020322130120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224145 (or 2224141 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31020322130120 its reverse (2103122302013), we get a palindrome (33123444432133).

The spelling of 31020322130120 in words is "thirty-one trillion, twenty billion, three hundred twenty-two million, one hundred thirty thousand, one hundred twenty".