21310200133 has 4 divisors (see below), whose sum is σ = 21319423648. Its totient is φ = 21300976620.

The previous prime is 21310200053. The next prime is 21310200161. The reversal of 21310200133 is 33100201312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21310200133 - 2²⁵ = 21276645701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310209133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4608291 + ... + 4612912.

It is an arithmetic number, because the mean of its divisors is an integer number (5329855912).

Almost surely, 2^21310200133 is an apocalyptic number.

It is an amenable number.

21310200133 is a deficient number, since it is larger than the sum of its proper divisors (9223515).

21310200133 is an equidigital number, since it uses as much as digits as its factorization.

21310200133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223514.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21310200133 its reverse (33100201312), we get a palindrome (54410401445).

The spelling of 21310200133 in words is "twenty-one billion, three hundred ten million, two hundred thousand, one hundred thirty-three".