125191011 has 16 divisors (see below), whose sum is σ = 183431808. Its totient is φ = 75316800.

The previous prime is 125190991. The next prime is 125191021. The reversal of 125191011 is 110191521.

It is not a de Polignac number, because 125191011 - 2¹¹ = 125188963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125191021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9325 + ... + 18366.

It is an arithmetic number, because the mean of its divisors is an integer number (11464488).

Almost surely, 2^125191011 is an apocalyptic number.

125191011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125191011 is a deficient number, since it is larger than the sum of its proper divisors (58240797).

125191011 is a wasteful number, since it uses less digits than its factorization.

125191011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27842.

The product of its (nonzero) digits is 90, while the sum is 21.

The square root of 125191011 is about 11188.8788982632. The cubic root of 125191011 is about 500.2545517182.

It can be divided in two parts, 12519 and 1011, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 125191011 in words is "one hundred twenty-five million, one hundred ninety-one thousand, eleven".