13420142621 has 2 divisors, whose sum is σ = 13420142622. Its totient is φ = 13420142620.

The previous prime is 13420142611. The next prime is 13420142623. The reversal of 13420142621 is 12624102431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13129951396 + 290191225 = 114586^2 + 17035^2 .

It is a cyclic number.

It is not a de Polignac number, because 13420142621 - 2³⁰ = 12346400797 is a prime.

Together with 13420142623, 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 (13420142623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710071310 + 6710071311.

It is an arithmetic number, because the mean of its divisors is an integer number (6710071311).

Almost surely, 2^13420142621 is an apocalyptic number.

It is an amenable number.

13420142621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13420142621 is an equidigital number, since it uses as much as digits as its factorization.

13420142621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The spelling of 13420142621 in words is "thirteen billion, four hundred twenty million, one hundred forty-two thousand, six hundred twenty-one".