221125124 has 24 divisors (see below), whose sum is σ = 425240928. Its totient is φ = 99775040.

The previous prime is 221125123. The next prime is 221125127. The reversal of 221125124 is 421521122.

It is a junction number, because it is equal to n+sod(n) for n = 221125096 and 221125105.

It is not an unprimeable number, because it can be changed into a prime (221125123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12314 + ... + 24369.

It is an arithmetic number, because the mean of its divisors is an integer number (17718372).

Almost surely, 2^221125124 is an apocalyptic number.

It is an amenable number.

221125124 is a deficient number, since it is larger than the sum of its proper divisors (204115804).

221125124 is a wasteful number, since it uses less digits than its factorization.

221125124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36835 (or 36833 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 221125124 is about 14870.2765273548. The cubic root of 221125124 is about 604.7084395293.

Adding to 221125124 its reverse (421521122), we get a palindrome (642646246).

The spelling of 221125124 in words is "two hundred twenty-one million, one hundred twenty-five thousand, one hundred twenty-four".