21223231020331 has 6 divisors (see below), whose sum is σ = 22186099725020. Its totient is φ = 20300481845028.

The previous prime is 21223231020317. The next prime is 21223231020361. The reversal of 21223231020331 is 13302013232212.

It is a de Polignac number, because none of the positive numbers 2^k-21223231020331 is a prime.

It is a super-2 number, since 2×21223231020331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21223231020296 and 21223231020305.

It is not an unprimeable number, because it can be changed into a prime (21223231020311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20059764141 + ... + 20059765198.

Almost surely, 2^{21223231020331} is an apocalyptic number.

21223231020331 is a deficient number, since it is larger than the sum of its proper divisors (962868704689).

21223231020331 is an equidigital number, since it uses as much as digits as its factorization.

21223231020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40119529385 (or 40119529362 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21223231020331 its reverse (13302013232212), we get a palindrome (34525244252543).

The spelling of 21223231020331 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred thirty-one million, twenty thousand, three hundred thirty-one".