125121711 has 32 divisors (see below), whose sum is σ = 199729152. Its totient is φ = 68664960.

The previous prime is 125121691. The next prime is 125121721. The reversal of 125121711 is 117121521.

It is not a de Polignac number, because 125121711 - 2¹¹ = 125119663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125121721) 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 in 31 ways as a sum of consecutive naturals, for example, 19986 + ... + 25488.

It is an arithmetic number, because the mean of its divisors is an integer number (6241536).

Almost surely, 2^125121711 is an apocalyptic number.

125121711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125121711 is a deficient number, since it is larger than the sum of its proper divisors (74607441).

125121711 is a wasteful number, since it uses less digits than its factorization.

125121711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583.

The product of its digits is 140, while the sum is 21.

The square root of 125121711 is about 11185.7816445700. The cubic root of 125121711 is about 500.1622286913.

The spelling of 125121711 in words is "one hundred twenty-five million, one hundred twenty-one thousand, seven hundred eleven".