125602226521 has 2 divisors, whose sum is σ = 125602226522. Its totient is φ = 125602226520.

The previous prime is 125602226507. The next prime is 125602226551. The reversal of 125602226521 is 125622206521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97366465296 + 28235761225 = 312036^2 + 168035^2 .

It is a cyclic number.

It is not a de Polignac number, because 125602226521 - 2¹⁵ = 125602193753 is a prime.

It is not a weakly prime, because it can be changed into another prime (125602226551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62801113260 + 62801113261.

It is an arithmetic number, because the mean of its divisors is an integer number (62801113261).

Almost surely, 2^125602226521 is an apocalyptic number.

It is an amenable number.

125602226521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125602226521 is an equidigital number, since it uses as much as digits as its factorization.

125602226521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 125602226521 in words is "one hundred twenty-five billion, six hundred two million, two hundred twenty-six thousand, five hundred twenty-one".