21310221131333 has 4 divisors (see below), whose sum is σ = 21310341692160. Its totient is φ = 21310100570508.

The previous prime is 21310221131273. The next prime is 21310221131357. The reversal of 21310221131333 is 33313112201312.

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 21310221131333 - 2¹⁰ = 21310221130309 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 (21310221131363) 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, 60014885 + ... + 60368922.

It is an arithmetic number, because the mean of its divisors is an integer number (5327585423040).

Almost surely, 2^{21310221131333} is an apocalyptic number.

It is an amenable number.

21310221131333 is a deficient number, since it is larger than the sum of its proper divisors (120560827).

21310221131333 is a wasteful number, since it uses less digits than its factorization.

21310221131333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120560826.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21310221131333 its reverse (33313112201312), we get a palindrome (54623333332645).

The spelling of 21310221131333 in words is "twenty-one trillion, three hundred ten billion, two hundred twenty-one million, one hundred thirty-one thousand, three hundred thirty-three".