21311113033 has 8 divisors (see below), whose sum is σ = 24357423168. Its totient is φ = 18265269264.

The previous prime is 21311113003. The next prime is 21311113063. The reversal of 21311113033 is 33031111312.

It is an interprime number because it is at equal distance from previous prime (21311113003) and next prime (21311113063).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21311113033 - 2²⁹ = 20774242121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21311113033.

It is not an unprimeable number, because it can be changed into a prime (21311113003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12466 + ... + 206827.

It is an arithmetic number, because the mean of its divisors is an integer number (3044677896).

Almost surely, 2^21311113033 is an apocalyptic number.

It is an amenable number.

21311113033 is a deficient number, since it is larger than the sum of its proper divisors (3046310135).

21311113033 is a wasteful number, since it uses less digits than its factorization.

21311113033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233183.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21311113033 its reverse (33031111312), we get a palindrome (54342224345).

The spelling of 21311113033 in words is "twenty-one billion, three hundred eleven million, one hundred thirteen thousand, thirty-three".