21120031311003 has 64 divisors (see below), whose sum is σ = 32744219791360. Its totient is φ = 13437725817600.

The previous prime is 21120031310977. The next prime is 21120031311019. The reversal of 21120031311003 is 30011313002112.

It is not a de Polignac number, because 21120031311003 - 2³⁰ = 21118957569179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120031311103) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1131764493 + ... + 1131783153.

It is an arithmetic number, because the mean of its divisors is an integer number (511628434240).

Almost surely, 2^{21120031311003} is an apocalyptic number.

21120031311003 is a deficient number, since it is larger than the sum of its proper divisors (11624188480357).

21120031311003 is a wasteful number, since it uses less digits than its factorization.

21120031311003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37297 (or 37291 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21120031311003 its reverse (30011313002112), we get a palindrome (51131344313115).

The spelling of 21120031311003 in words is "twenty-one trillion, one hundred twenty billion, thirty-one million, three hundred eleven thousand, three".