1313332121 has 2 divisors, whose sum is σ = 1313332122. Its totient is φ = 1313332120.

The previous prime is 1313332099. The next prime is 1313332147. The reversal of 1313332121 is 1212333131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1236506896 + 76825225 = 35164^2 + 8765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313332121 - 2²⁶ = 1246223257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313332093 and 1313332102.

It is not a weakly prime, because it can be changed into another prime (1313332921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656666060 + 656666061.

It is an arithmetic number, because the mean of its divisors is an integer number (656666061).

Almost surely, 2^1313332121 is an apocalyptic number.

It is an amenable number.

1313332121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313332121 is an equidigital number, since it uses as much as digits as its factorization.

1313332121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 20.

The square root of 1313332121 is about 36239.9244066541. The cubic root of 1313332121 is about 1095.1111195727. Note that the first 5 decimals are identical.

Adding to 1313332121 its reverse (1212333131), we get a palindrome (2525665252).

It can be divided in two parts, 13133 and 32121, that added together give a palindrome (45254).

The spelling of 1313332121 in words is "one billion, three hundred thirteen million, three hundred thirty-two thousand, one hundred twenty-one".