13423355542021 has 2 divisors, whose sum is σ = 13423355542022. Its totient is φ = 13423355542020.

The previous prime is 13423355541923. The next prime is 13423355542043. The reversal of 13423355542021 is 12024555332431.

13423355542021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13423027425025 + 328116996 = 3663745^2 + 18114^2 .

It is an emirp because it is prime and its reverse (12024555332431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13423355542021 - 2¹³ = 13423355533829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13423355542081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6711677771010 + 6711677771011.

It is an arithmetic number, because the mean of its divisors is an integer number (6711677771011).

Almost surely, 2^{13423355542021} is an apocalyptic number.

It is an amenable number.

13423355542021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13423355542021 is an equidigital number, since it uses as much as digits as its factorization.

13423355542021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 13423355542021 in words is "thirteen trillion, four hundred twenty-three billion, three hundred fifty-five million, five hundred forty-two thousand, twenty-one".