13313213121 has 12 divisors (see below), whose sum is σ = 19221444528. Its totient is φ = 8192746224.

The previous prime is 13313213087. The next prime is 13313213131. The reversal of 13313213121 is 12131231331.

It is a happy number.

It is not a de Polignac number, because 13313213121 - 2¹⁰ = 13313212097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13313213131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13128895 + ... + 13129908.

It is an arithmetic number, because the mean of its divisors is an integer number (1601787044).

Almost surely, 2^13313213121 is an apocalyptic number.

It is an amenable number.

13313213121 is a deficient number, since it is larger than the sum of its proper divisors (5908231407).

13313213121 is a wasteful number, since it uses less digits than its factorization.

13313213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26258832 (or 26258819 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 13313213121 its reverse (12131231331), we get a palindrome (25444444452).

The spelling of 13313213121 in words is "thirteen billion, three hundred thirteen million, two hundred thirteen thousand, one hundred twenty-one".