31103123232420 has 108 divisors (see below), whose sum is σ = 100222370841684. Its totient is φ = 7806274053120.

The previous prime is 31103123232407. The next prime is 31103123232427. The reversal of 31103123232420 is 2423232130113.

31103123232420 is a `hidden beast` number, since 3 + 1 + 1 + 0 + 3 + 1 + 2 + 3 + 232 + 420 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 396386086464 + 30706737145956 = 629592^2 + 5541366^2 .

It is a super-2 number, since 2×31103123232420² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31103123232427) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 298901491 + ... + 299005530.

Almost surely, 2^{31103123232420} is an apocalyptic number.

31103123232420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31103123232420 is an abundant number, since it is smaller than the sum of its proper divisors (69119247609264).

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

31103123232420 is a wasteful number, since it uses less digits than its factorization.

31103123232420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597907070 (or 597907048 counting only the distinct ones).

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

Adding to 31103123232420 its reverse (2423232130113), we get a palindrome (33526355362533).

The spelling of 31103123232420 in words is "thirty-one trillion, one hundred three billion, one hundred twenty-three million, two hundred thirty-two thousand, four hundred twenty".