21122321333231 has 16 divisors (see below), whose sum is σ = 22101024960000. Its totient is φ = 20148705511968.

The previous prime is 21122321333177. The next prime is 21122321333249. The reversal of 21122321333231 is 13233312322112.

It is a cyclic number.

It is not a de Polignac number, because 21122321333231 - 2⁶ = 21122321333167 is a prime.

It is a super-2 number, since 2×21122321333231² (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 = 21122321333194 and 21122321333203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122321323231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15015905 + ... + 16362213.

It is an arithmetic number, because the mean of its divisors is an integer number (1381314060000).

Almost surely, 2^{21122321333231} is an apocalyptic number.

21122321333231 is a deficient number, since it is larger than the sum of its proper divisors (978703626769).

21122321333231 is a wasteful number, since it uses less digits than its factorization.

21122321333231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348198.

The product of its digits is 7776, while the sum is 29.

Adding to 21122321333231 its reverse (13233312322112), we get a palindrome (34355633655343).

The spelling of 21122321333231 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred twenty-one million, three hundred thirty-three thousand, two hundred thirty-one".