21333010312231 has 6 divisors (see below), whose sum is σ = 22661709916760. Its totient is φ = 20078127352416.

The previous prime is 21333010312127. The next prime is 21333010312259. The reversal of 21333010312231 is 13221301033312.

It is not a de Polignac number, because 21333010312231 - 2³³ = 21324420377639 is a prime.

It is a super-2 number, since 2×21333010312231² (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 = 21333010312196 and 21333010312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333010312931) 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, 36908322051 + ... + 36908322628.

Almost surely, 2^{21333010312231} is an apocalyptic number.

21333010312231 is a deficient number, since it is larger than the sum of its proper divisors (1328699604529).

21333010312231 is an equidigital number, since it uses as much as digits as its factorization.

21333010312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73816644713 (or 73816644696 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21333010312231 its reverse (13221301033312), we get a palindrome (34554311345543).

The spelling of 21333010312231 in words is "twenty-one trillion, three hundred thirty-three billion, ten million, three hundred twelve thousand, two hundred thirty-one".