13221032402 has 4 divisors (see below), whose sum is σ = 19831548606. Its totient is φ = 6610516200.

The previous prime is 13221032381. The next prime is 13221032441. The reversal of 13221032402 is 20423012231.

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

It can be written as a sum of positive squares in only one way, i.e., 12515120641 + 705911761 = 111871^2 + 26569^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305258099 + ... + 3305258102.

Almost surely, 2^13221032402 is an apocalyptic number.

13221032402 is a deficient number, since it is larger than the sum of its proper divisors (6610516204).

13221032402 is an equidigital number, since it uses as much as digits as its factorization.

13221032402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610516203.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 13221032402 its reverse (20423012231), we get a palindrome (33644044633).

The spelling of 13221032402 in words is "thirteen billion, two hundred twenty-one million, thirty-two thousand, four hundred two".