125200838523961 has 2 divisors, whose sum is σ = 125200838523962. Its totient is φ = 125200838523960.

The previous prime is 125200838523899. The next prime is 125200838523989. The reversal of 125200838523961 is 169325838002521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97392818688400 + 27808019835561 = 9868780^2 + 5273331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125200838523961 is a prime.

It is a super-2 number, since 2×125200838523961² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125200838529961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62600419261980 + 62600419261981.

It is an arithmetic number, because the mean of its divisors is an integer number (62600419261981).

Almost surely, 2^{125200838523961} is an apocalyptic number.

It is an amenable number.

125200838523961 is a deficient number, since it is larger than the sum of its proper divisors (1).

125200838523961 is an equidigital number, since it uses as much as digits as its factorization.

125200838523961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 125200838523961 in words is "one hundred twenty-five trillion, two hundred billion, eight hundred thirty-eight million, five hundred twenty-three thousand, nine hundred sixty-one".