13125251454221 has 2 divisors, whose sum is σ = 13125251454222. Its totient is φ = 13125251454220.

The previous prime is 13125251454179. The next prime is 13125251454277. The reversal of 13125251454221 is 12245415252131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12867680994025 + 257570460196 = 3587155^2 + 507514^2 .

It is a cyclic number.

It is not a de Polignac number, because 13125251454221 - 2⁶ = 13125251454157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13125253454221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6562625727110 + 6562625727111.

It is an arithmetic number, because the mean of its divisors is an integer number (6562625727111).

Almost surely, 2^{13125251454221} is an apocalyptic number.

It is an amenable number.

13125251454221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13125251454221 is an equidigital number, since it uses as much as digits as its factorization.

13125251454221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96000, while the sum is 38.

The spelling of 13125251454221 in words is "thirteen trillion, one hundred twenty-five billion, two hundred fifty-one million, four hundred fifty-four thousand, two hundred twenty-one".