13221442506 has 8 divisors (see below), whose sum is σ = 26442885024. Its totient is φ = 4407147500.

The previous prime is 13221442469. The next prime is 13221442511. The reversal of 13221442506 is 60524412231.

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

13221442506 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101786870 + ... + 1101786881.

It is an arithmetic number, because the mean of its divisors is an integer number (3305360628).

Almost surely, 2^13221442506 is an apocalyptic number.

13221442506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221442506 is a wasteful number, since it uses less digits than its factorization.

13221442506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203573756.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 13221442506 its reverse (60524412231), we get a palindrome (73745854737).

The spelling of 13221442506 in words is "thirteen billion, two hundred twenty-one million, four hundred forty-two thousand, five hundred six".