1313322023021 has 2 divisors, whose sum is σ = 1313322023022. Its totient is φ = 1313322023020.

The previous prime is 1313322022997. The next prime is 1313322023023. The reversal of 1313322023021 is 1203202233131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 724219722121 + 589102300900 = 851011^2 + 767530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313322023021 is a prime.

Together with 1313322023023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313322023023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656661011510 + 656661011511.

It is an arithmetic number, because the mean of its divisors is an integer number (656661011511).

Almost surely, 2^{1313322023021} is an apocalyptic number.

It is an amenable number.

1313322023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313322023021 is an equidigital number, since it uses as much as digits as its factorization.

1313322023021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1313322023021 its reverse (1203202233131), we get a palindrome (2516524256152).

The spelling of 1313322023021 in words is "one trillion, three hundred thirteen billion, three hundred twenty-two million, twenty-three thousand, twenty-one".