13221923402 has 8 divisors (see below), whose sum is σ = 19833415716. Its totient is φ = 6610784832.

The previous prime is 13221923381. The next prime is 13221923411. The reversal of 13221923402 is 20432912231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13050549121 + 171374281 = 114239^2 + 13091^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45698 + ... + 168914.

Almost surely, 2^13221923402 is an apocalyptic number.

13221923402 is a deficient number, since it is larger than the sum of its proper divisors (6611492314).

13221923402 is a wasteful number, since it uses less digits than its factorization.

13221923402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176872.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 13221923402 in words is "thirteen billion, two hundred twenty-one million, nine hundred twenty-three thousand, four hundred two".