13131221033332 has 12 divisors (see below), whose sum is σ = 22979859753060. Its totient is φ = 6565546818176.

The previous prime is 13131221033221. The next prime is 13131221033341. The reversal of 13131221033332 is 23333012213131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4890440336356 + 8240780696976 = 2211434^2 + 2870676^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13131221033332.

It is a congruent 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, 15459283 + ... + 16286554.

It is an arithmetic number, because the mean of its divisors is an integer number (1914988312755).

Almost surely, 2^{13131221033332} is an apocalyptic number.

It is an amenable number.

13131221033332 is a deficient number, since it is larger than the sum of its proper divisors (9848638719728).

13131221033332 is a wasteful number, since it uses less digits than its factorization.

13131221033332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31849250 (or 31849248 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 13131221033332 its reverse (23333012213131), we get a palindrome (36464233246463).

The spelling of 13131221033332 in words is "thirteen trillion, one hundred thirty-one billion, two hundred twenty-one million, thirty-three thousand, three hundred thirty-two".