21310202221321 has 32 divisors (see below), whose sum is σ = 23072757603840. Its totient is φ = 19565541964800.

The previous prime is 21310202221313. The next prime is 21310202221327. The reversal of 21310202221321 is 12312220201312.

It is not a de Polignac number, because 21310202221321 - 2³ = 21310202221313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21310202221292 and 21310202221301.

It is not an unprimeable number, because it can be changed into a prime (21310202221327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8905223301 + ... + 8905225693.

It is an arithmetic number, because the mean of its divisors is an integer number (721023675120).

Almost surely, 2^{21310202221321} is an apocalyptic number.

It is an amenable number.

21310202221321 is a deficient number, since it is larger than the sum of its proper divisors (1762555382519).

21310202221321 is a wasteful number, since it uses less digits than its factorization.

21310202221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5857.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21310202221321 its reverse (12312220201312), we get a palindrome (33622422422633).

The spelling of 21310202221321 in words is "twenty-one trillion, three hundred ten billion, two hundred two million, two hundred twenty-one thousand, three hundred twenty-one".