21120322123331 has 16 divisors (see below), whose sum is σ = 21357935968608. Its totient is φ = 20883280704000.

The previous prime is 21120322123309. The next prime is 21120322123333. The reversal of 21120322123331 is 13332122302112.

It is a cyclic number.

It is not a de Polignac number, because 21120322123331 - 2³⁰ = 21119248381507 is a prime.

It is a super-2 number, since 2×21120322123331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21120322123331.

It is not an unprimeable number, because it can be changed into a prime (21120322123333) 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, 332608421 + ... + 332671913.

It is an arithmetic number, because the mean of its divisors is an integer number (1334870998038).

Almost surely, 2^{21120322123331} is an apocalyptic number.

21120322123331 is a deficient number, since it is larger than the sum of its proper divisors (237613845277).

21120322123331 is a wasteful number, since it uses less digits than its factorization.

21120322123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67942.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21120322123331 its reverse (13332122302112), we get a palindrome (34452444425443).

The spelling of 21120322123331 in words is "twenty-one trillion, one hundred twenty billion, three hundred twenty-two million, one hundred twenty-three thousand, three hundred thirty-one".