125051225261 has 2 divisors, whose sum is σ = 125051225262. Its totient is φ = 125051225260.

The previous prime is 125051225213. The next prime is 125051225267. The reversal of 125051225261 is 162522150521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118040344900 + 7010880361 = 343570^2 + 83731^2 .

It is a cyclic number.

It is not a de Polignac number, because 125051225261 - 2¹⁸ = 125050963117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125051225267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62525612630 + 62525612631.

It is an arithmetic number, because the mean of its divisors is an integer number (62525612631).

Almost surely, 2^125051225261 is an apocalyptic number.

It is an amenable number.

125051225261 is a deficient number, since it is larger than the sum of its proper divisors (1).

125051225261 is an equidigital number, since it uses as much as digits as its factorization.

125051225261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 125051225261 its reverse (162522150521), we get a palindrome (287573375782).

The spelling of 125051225261 in words is "one hundred twenty-five billion, fifty-one million, two hundred twenty-five thousand, two hundred sixty-one".