21323120111233 has 4 divisors (see below), whose sum is σ = 21350848486660. Its totient is φ = 21295391735808.

The previous prime is 21323120111143. The next prime is 21323120111261. The reversal of 21323120111233 is 33211102132312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2617771910209 + 18705348201024 = 1617953^2 + 4324968^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323120111233 - 2³⁷ = 21185681157761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323120111198 and 21323120111207.

It is not an unprimeable number, because it can be changed into a prime (21323120411233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13864186560 + ... + 13864188097.

It is an arithmetic number, because the mean of its divisors is an integer number (5337712121665).

Almost surely, 2^{21323120111233} is an apocalyptic number.

It is an amenable number.

21323120111233 is a deficient number, since it is larger than the sum of its proper divisors (27728375427).

21323120111233 is an equidigital number, since it uses as much as digits as its factorization.

21323120111233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27728375426.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21323120111233 its reverse (33211102132312), we get a palindrome (54534222243545).

The spelling of 21323120111233 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred twenty million, one hundred eleven thousand, two hundred thirty-three".