125422121551 has 2 divisors, whose sum is σ = 125422121552. Its totient is φ = 125422121550.

The previous prime is 125422121549. The next prime is 125422121579. The reversal of 125422121551 is 155121224521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125422121551 - 2¹ = 125422121549 is a prime.

Together with 125422121549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125422121051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62711060775 + 62711060776.

It is an arithmetic number, because the mean of its divisors is an integer number (62711060776).

Almost surely, 2^125422121551 is an apocalyptic number.

125422121551 is a deficient number, since it is larger than the sum of its proper divisors (1).

125422121551 is an equidigital number, since it uses as much as digits as its factorization.

125422121551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8000, while the sum is 31.

The spelling of 125422121551 in words is "one hundred twenty-five billion, four hundred twenty-two million, one hundred twenty-one thousand, five hundred fifty-one".