13343557021 has 2 divisors, whose sum is σ = 13343557022. Its totient is φ = 13343557020.

The previous prime is 13343556953. The next prime is 13343557027. The reversal of 13343557021 is 12075534331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13055576121 + 287980900 = 114261^2 + 16970^2 .

It is a cyclic number.

It is not a de Polignac number, because 13343557021 - 2⁹ = 13343556509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13343557027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6671778510 + 6671778511.

It is an arithmetic number, because the mean of its divisors is an integer number (6671778511).

Almost surely, 2^13343557021 is an apocalyptic number.

It is an amenable number.

13343557021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13343557021 is an equidigital number, since it uses as much as digits as its factorization.

13343557021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 34.

The spelling of 13343557021 in words is "thirteen billion, three hundred forty-three million, five hundred fifty-seven thousand, twenty-one".