125220111 has 8 divisors (see below), whose sum is σ = 167042304. Its totient is φ = 83439000.

The previous prime is 125220097. The next prime is 125220131. The reversal of 125220111 is 111022521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125220111 - 2¹⁵ = 125187343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125220131) 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 7 ways as a sum of consecutive naturals, for example, 2265 + ... + 15986.

It is an arithmetic number, because the mean of its divisors is an integer number (20880288).

Almost surely, 2^125220111 is an apocalyptic number.

125220111 is a deficient number, since it is larger than the sum of its proper divisors (41822193).

125220111 is a wasteful number, since it uses less digits than its factorization.

125220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20541.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 125220111 is about 11190.1792210849. The cubic root of 125220111 is about 500.2933092391.

Adding to 125220111 its reverse (111022521), we get a palindrome (236242632).

The spelling of 125220111 in words is "one hundred twenty-five million, two hundred twenty thousand, one hundred eleven".