21423112323331 has 16 divisors (see below), whose sum is σ = 22696756243200. Its totient is φ = 20150965785600.

The previous prime is 21423112323329. The next prime is 21423112323367. The reversal of 21423112323331 is 13332321132412.

It is a cyclic number.

It is not a de Polignac number, because 21423112323331 - 2¹ = 21423112323329 is a prime.

It is a super-2 number, since 2×21423112323331² (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 = 21423112323293 and 21423112323302.

It is not an unprimeable number, because it can be changed into a prime (21423112323391) 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, 668265855 + ... + 668297911.

It is an arithmetic number, because the mean of its divisors is an integer number (1418547265200).

Almost surely, 2^{21423112323331} is an apocalyptic number.

21423112323331 is a deficient number, since it is larger than the sum of its proper divisors (1273643919869).

21423112323331 is a wasteful number, since it uses less digits than its factorization.

21423112323331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54174.

The product of its digits is 15552, while the sum is 31.

Adding to 21423112323331 its reverse (13332321132412), we get a palindrome (34755433455743).

The spelling of 21423112323331 in words is "twenty-one trillion, four hundred twenty-three billion, one hundred twelve million, three hundred twenty-three thousand, three hundred thirty-one".