13201423255421 has 2 divisors, whose sum is σ = 13201423255422. Its totient is φ = 13201423255420.

The previous prime is 13201423255417. The next prime is 13201423255429. The reversal of 13201423255421 is 12455232410231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13099231149796 + 102192105625 = 3619286^2 + 319675^2 .

It is a cyclic number.

It is not a de Polignac number, because 13201423255421 - 2² = 13201423255417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13201423255429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6600711627710 + 6600711627711.

It is an arithmetic number, because the mean of its divisors is an integer number (6600711627711).

Almost surely, 2^{13201423255421} is an apocalyptic number.

It is an amenable number.

13201423255421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13201423255421 is an equidigital number, since it uses as much as digits as its factorization.

13201423255421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 13201423255421 its reverse (12455232410231), we get a palindrome (25656655665652).

The spelling of 13201423255421 in words is "thirteen trillion, two hundred one billion, four hundred twenty-three million, two hundred fifty-five thousand, four hundred twenty-one".