125611121 has 4 divisors (see below), whose sum is σ = 127124592. Its totient is φ = 124097652.

The previous prime is 125611117. The next prime is 125611133. The reversal of 125611121 is 121116521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125611121 - 2² = 125611117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125611093 and 125611102.

It is not an unprimeable number, because it can be changed into a prime (125611621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756611 + ... + 756776.

It is an arithmetic number, because the mean of its divisors is an integer number (31781148).

Almost surely, 2^125611121 is an apocalyptic number.

It is an amenable number.

125611121 is a deficient number, since it is larger than the sum of its proper divisors (1513471).

125611121 is an equidigital number, since it uses as much as digits as its factorization.

125611121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513470.

The product of its digits is 120, while the sum is 20.

The square root of 125611121 is about 11207.6367268037. The cubic root of 125611121 is about 500.8135037056.

Adding to 125611121 its reverse (121116521), we get a palindrome (246727642).

The spelling of 125611121 in words is "one hundred twenty-five million, six hundred eleven thousand, one hundred twenty-one".