21223932206399 has 12 divisors (see below), whose sum is σ = 23358883978152. Its totient is φ = 19270152813600.

The previous prime is 21223932206387. The next prime is 21223932206429. The reversal of 21223932206399 is 99360223932212.

It is not a de Polignac number, because 21223932206399 - 2²⁴ = 21223915429183 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21223932206399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223932206359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1029378197 + ... + 1029398814.

It is an arithmetic number, because the mean of its divisors is an integer number (1946573664846).

Almost surely, 2^{21223932206399} is an apocalyptic number.

21223932206399 is a deficient number, since it is larger than the sum of its proper divisors (2134951771753).

21223932206399 is a wasteful number, since it uses less digits than its factorization.

21223932206399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058777098 (or 2058777085 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 53.

The spelling of 21223932206399 in words is "twenty-one trillion, two hundred twenty-three billion, nine hundred thirty-two million, two hundred six thousand, three hundred ninety-nine".