125222011 has 2 divisors, whose sum is σ = 125222012. Its totient is φ = 125222010.

The previous prime is 125221997. The next prime is 125222033. The reversal of 125222011 is 110222521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125222011 - 2⁷ = 125221883 is a prime.

It is not a weakly prime, because it can be changed into another prime (125223011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62611005 + 62611006.

It is an arithmetic number, because the mean of its divisors is an integer number (62611006).

Almost surely, 2^125222011 is an apocalyptic number.

125222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

125222011 is an equidigital number, since it uses as much as digits as its factorization.

125222011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 125222011 is about 11190.2641166328. The cubic root of 125222011 is about 500.2958395900.

Adding to 125222011 its reverse (110222521), we get a palindrome (235444532).

The spelling of 125222011 in words is "one hundred twenty-five million, two hundred twenty-two thousand, eleven".