31103355321 has 12 divisors (see below), whose sum is σ = 46591034672. Its totient is φ = 20735570052.

The previous prime is 31103355263. The next prime is 31103355323. The reversal of 31103355321 is 12355330113.

31103355321 is a `hidden beast` number, since 3 + 1 + 1 + 0 + 335 + 5 + 321 = 666.

It is not a de Polignac number, because 31103355321 - 2¹⁰ = 31103354297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31103355323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63998431 + ... + 63998916.

Almost surely, 2^31103355321 is an apocalyptic number.

It is an amenable number.

31103355321 is a deficient number, since it is larger than the sum of its proper divisors (15487679351).

31103355321 is an equidigital number, since it uses as much as digits as its factorization.

31103355321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127997362 (or 127997350 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

Adding to 31103355321 its reverse (12355330113), we get a palindrome (43458685434).

The spelling of 31103355321 in words is "thirty-one billion, one hundred three million, three hundred fifty-five thousand, three hundred twenty-one".