1313401021 has 2 divisors, whose sum is σ = 1313401022. Its totient is φ = 1313401020.

The previous prime is 1313401013. The next prime is 1313401027. The reversal of 1313401021 is 1201043131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1259540100 + 53860921 = 35490^2 + 7339^2 .

It is an emirp because it is prime and its reverse (1201043131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313401021 - 2³ = 1313401013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313400986 and 1313401004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313401027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656700510 + 656700511.

It is an arithmetic number, because the mean of its divisors is an integer number (656700511).

Almost surely, 2^1313401021 is an apocalyptic number.

It is an amenable number.

1313401021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313401021 is an equidigital number, since it uses as much as digits as its factorization.

1313401021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1313401021 is about 36240.8750032336. The cubic root of 1313401021 is about 1095.1302698027.

Adding to 1313401021 its reverse (1201043131), we get a palindrome (2514444152).

The spelling of 1313401021 in words is "one billion, three hundred thirteen million, four hundred one thousand, twenty-one".