1313132232221 has 8 divisors (see below), whose sum is σ = 1326868669560. Its totient is φ = 1299399856128.

The previous prime is 1313132232163. The next prime is 1313132232257. The reversal of 1313132232221 is 1222322313131.

It can be written as a sum of positive squares in 4 ways, for example, as 110929629721 + 1202202602500 = 333061^2 + 1096450^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313132232221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313132232521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363086 + ... + 1660751.

It is an arithmetic number, because the mean of its divisors is an integer number (165858583695).

Almost surely, 2^{1313132232221} is an apocalyptic number.

It is an amenable number.

1313132232221 is a deficient number, since it is larger than the sum of its proper divisors (13736437339).

1313132232221 is an equidigital number, since it uses as much as digits as its factorization.

1313132232221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030623.

The product of its digits is 2592, while the sum is 26.

Adding to 1313132232221 its reverse (1222322313131), we get a palindrome (2535454545352).

The spelling of 1313132232221 in words is "one trillion, three hundred thirteen billion, one hundred thirty-two million, two hundred thirty-two thousand, two hundred twenty-one".