125551211 has 2 divisors, whose sum is σ = 125551212. Its totient is φ = 125551210.

The previous prime is 125551207. The next prime is 125551229. The reversal of 125551211 is 112155521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125551211 - 2² = 125551207 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125551201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62775605 + 62775606.

It is an arithmetic number, because the mean of its divisors is an integer number (62775606).

Almost surely, 2^125551211 is an apocalyptic number.

125551211 is a deficient number, since it is larger than the sum of its proper divisors (1).

125551211 is an equidigital number, since it uses as much as digits as its factorization.

125551211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500, while the sum is 23.

The square root of 125551211 is about 11204.9636768711. The cubic root of 125551211 is about 500.7338703417.

The spelling of 125551211 in words is "one hundred twenty-five million, five hundred fifty-one thousand, two hundred eleven".