31113332202420 has 144 divisors (see below), whose sum is σ = 101892900542160. Its totient is φ = 7639374809088.

The previous prime is 31113332202397. The next prime is 31113332202479. The reversal of 31113332202420 is 2420223331113.

31113332202420 is a `hidden beast` number, since 3 + 1 + 1 + 1 + 3 + 3 + 32 + 202 + 420 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 110641386384 + 31002690816036 = 332628^2 + 5568006^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15816985 + ... + 17674944.

Almost surely, 2^{31113332202420} is an apocalyptic number.

31113332202420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31113332202420 is an abundant number, since it is smaller than the sum of its proper divisors (70779568339740).

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

31113332202420 is a wasteful number, since it uses less digits than its factorization.

31113332202420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33492354 (or 33492349 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 31113332202420 its reverse (2420223331113), we get a palindrome (33533555533533).

The spelling of 31113332202420 in words is "thirty-one trillion, one hundred thirteen billion, three hundred thirty-two million, two hundred two thousand, four hundred twenty".