21223312012323 has 24 divisors (see below), whose sum is σ = 32312467505136. Its totient is φ = 13916925900000.

The previous prime is 21223312012261. The next prime is 21223312012327. The reversal of 21223312012323 is 32321021332212.

21223312012323 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 331 + 2 + 0 + 1 + 2 + 323 = 666.

It is not a de Polignac number, because 21223312012323 - 2³² = 21219017045027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21223312012327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 715876428 + ... + 715906073.

It is an arithmetic number, because the mean of its divisors is an integer number (1346352812714).

Almost surely, 2^{21223312012323} is an apocalyptic number.

21223312012323 is a deficient number, since it is larger than the sum of its proper divisors (11089155492813).

21223312012323 is an equidigital number, since it uses as much as digits as its factorization.

21223312012323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431782577 (or 1431782565 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21223312012323 its reverse (32321021332212), we get a palindrome (53544333344535).

The spelling of 21223312012323 in words is "twenty-one trillion, two hundred twenty-three billion, three hundred twelve million, twelve thousand, three hundred twenty-three".