125533230521 has 2 divisors, whose sum is σ = 125533230522. Its totient is φ = 125533230520.

The previous prime is 125533230439. The next prime is 125533230539. The reversal of 125533230521 is 125032335521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103632486400 + 21900744121 = 321920^2 + 147989^2 .

It is an emirp because it is prime and its reverse (125032335521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125533230521 - 2¹⁴ = 125533214137 is a prime.

It is not a weakly prime, because it can be changed into another prime (125533230721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62766615260 + 62766615261.

It is an arithmetic number, because the mean of its divisors is an integer number (62766615261).

Almost surely, 2^125533230521 is an apocalyptic number.

It is an amenable number.

125533230521 is a deficient number, since it is larger than the sum of its proper divisors (1).

125533230521 is an equidigital number, since it uses as much as digits as its factorization.

125533230521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 32.

The spelling of 125533230521 in words is "one hundred twenty-five billion, five hundred thirty-three million, two hundred thirty thousand, five hundred twenty-one".