13021221304 has 64 divisors (see below), whose sum is σ = 30069224640. Its totient is φ = 5147781120.

The previous prime is 13021221271. The next prime is 13021221347. The reversal of 13021221304 is 40312212031.

It is a happy number.

It is a super-3 number, since 3×13021221304³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1256464 + ... + 1266784.

It is an arithmetic number, because the mean of its divisors is an integer number (469831635).

Almost surely, 2^13021221304 is an apocalyptic number.

13021221304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13021221304 is an abundant number, since it is smaller than the sum of its proper divisors (17048003336).

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

13021221304 is a wasteful number, since it uses less digits than its factorization.

13021221304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12080 (or 12076 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13021221304 its reverse (40312212031), we get a palindrome (53333433335).

The spelling of 13021221304 in words is "thirteen billion, twenty-one million, two hundred twenty-one thousand, three hundred four".