31002211442420 has 24 divisors (see below), whose sum is σ = 65104769675400. Its totient is φ = 12400860644352.

The previous prime is 31002211442399. The next prime is 31002211442453. The reversal of 31002211442420 is 2424411220013.

It can be written as a sum of positive squares in 4 ways, for example, as 6239824145296 + 24762387297124 = 2497964^2 + 4976182^2 .

It is a super-2 number, since 2×31002211442420² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31002211442420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12172976 + ... + 14497784.

It is an arithmetic number, because the mean of its divisors is an integer number (2712698736475).

Almost surely, 2^{31002211442420} is an apocalyptic number.

It is an amenable number.

31002211442420 is an abundant number, since it is smaller than the sum of its proper divisors (34102558232980).

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

31002211442420 is a wasteful number, since it uses less digits than its factorization.

31002211442420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991587 (or 2991585 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 31002211442420 its reverse (2424411220013), we get a palindrome (33426622662433).

The spelling of 31002211442420 in words is "thirty-one trillion, two billion, two hundred eleven million, four hundred forty-two thousand, four hundred twenty".