121545425213 has 2 divisors, whose sum is σ = 121545425214. Its totient is φ = 121545425212.

The previous prime is 121545425207. The next prime is 121545425257. The reversal of 121545425213 is 312524545121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121005188164 + 540237049 = 347858^2 + 23243^2 .

It is a cyclic number.

It is not a de Polignac number, because 121545425213 - 2⁶ = 121545425149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121545425263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60772712606 + 60772712607.

It is an arithmetic number, because the mean of its divisors is an integer number (60772712607).

Almost surely, 2^121545425213 is an apocalyptic number.

It is an amenable number.

121545425213 is a deficient number, since it is larger than the sum of its proper divisors (1).

121545425213 is an equidigital number, since it uses as much as digits as its factorization.

121545425213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 35.

The spelling of 121545425213 in words is "one hundred twenty-one billion, five hundred forty-five million, four hundred twenty-five thousand, two hundred thirteen".