125213191217 has 2 divisors, whose sum is σ = 125213191218. Its totient is φ = 125213191216.

The previous prime is 125213191189. The next prime is 125213191219. The reversal of 125213191217 is 712191312521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84472190881 + 40741000336 = 290641^2 + 201844^2 .

It is a cyclic number.

It is not a de Polignac number, because 125213191217 - 2²⁴ = 125196414001 is a prime.

Together with 125213191219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125213191219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62606595608 + 62606595609.

It is an arithmetic number, because the mean of its divisors is an integer number (62606595609).

Almost surely, 2^125213191217 is an apocalyptic number.

It is an amenable number.

125213191217 is a deficient number, since it is larger than the sum of its proper divisors (1).

125213191217 is an equidigital number, since it uses as much as digits as its factorization.

125213191217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 35.

The spelling of 125213191217 in words is "one hundred twenty-five billion, two hundred thirteen million, one hundred ninety-one thousand, two hundred seventeen".