13122402221 has 16 divisors (see below), whose sum is σ = 14503536000. Its totient is φ = 11809340928.

The previous prime is 13122402157. The next prime is 13122402229. The reversal of 13122402221 is 12220422131.

It is a cyclic number.

It is not a de Polignac number, because 13122402221 - 2⁶ = 13122402157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13122402193 and 13122402202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13122402229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1814150 + ... + 1821368.

It is an arithmetic number, because the mean of its divisors is an integer number (906471000).

Almost surely, 2^13122402221 is an apocalyptic number.

It is an amenable number.

13122402221 is a deficient number, since it is larger than the sum of its proper divisors (1381133779).

13122402221 is a wasteful number, since it uses less digits than its factorization.

13122402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11908.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 13122402221 its reverse (12220422131), we get a palindrome (25342824352).

The spelling of 13122402221 in words is "thirteen billion, one hundred twenty-two million, four hundred two thousand, two hundred twenty-one".