21113030331 has 48 divisors (see below), whose sum is σ = 31125852160. Its totient is φ = 13788947520.

The previous prime is 21113030329. The next prime is 21113030359. The reversal of 21113030331 is 13303031112.

It is a happy number.

21113030331 is a `hidden beast` number, since 21 + 11 + 303 + 0 + 331 = 666.

It is not a de Polignac number, because 21113030331 - 2¹ = 21113030329 is a prime.

It is a super-2 number, since 2×21113030331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21113030231) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57528510 + ... + 57528876.

Almost surely, 2^21113030331 is an apocalyptic number.

21113030331 is a deficient number, since it is larger than the sum of its proper divisors (10012821829).

21113030331 is a wasteful number, since it uses less digits than its factorization.

21113030331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 973 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21113030331 its reverse (13303031112), we get a palindrome (34416061443).

The spelling of 21113030331 in words is "twenty-one billion, one hundred thirteen million, thirty thousand, three hundred thirty-one".