21000313223331 has 64 divisors (see below), whose sum is σ = 32072102630400. Its totient is φ = 12127173520896.

The previous prime is 21000313223291. The next prime is 21000313223363. The reversal of 21000313223331 is 13332231300012.

It is not a de Polignac number, because 21000313223331 - 2¹⁰ = 21000313222307 is a prime.

It is a super-2 number, since 2×21000313223331² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21000313223371) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38184360 + ... + 38730426.

It is an arithmetic number, because the mean of its divisors is an integer number (501126603600).

Almost surely, 2^{21000313223331} is an apocalyptic number.

21000313223331 is a deficient number, since it is larger than the sum of its proper divisors (11071789407069).

21000313223331 is a wasteful number, since it uses less digits than its factorization.

21000313223331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547068.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21000313223331 its reverse (13332231300012), we get a palindrome (34332544523343).

The spelling of 21000313223331 in words is "twenty-one trillion, three hundred thirteen million, two hundred twenty-three thousand, three hundred thirty-one".