121618612 has 12 divisors (see below), whose sum is σ = 225352260. Its totient is φ = 57232256.

The previous prime is 121618597. The next prime is 121618613. The reversal of 121618612 is 216816121.

It can be written as a sum of positive squares in 2 ways, for example, as 42693156 + 78925456 = 6534^2 + 8884^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121618613) 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, 894187 + ... + 894322.

It is an arithmetic number, because the mean of its divisors is an integer number (18779355).

Almost surely, 2^121618612 is an apocalyptic number.

It is an amenable number.

121618612 is a deficient number, since it is larger than the sum of its proper divisors (103733648).

121618612 is a wasteful number, since it uses less digits than its factorization.

121618612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788530 (or 1788528 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 121618612 is about 11028.0828796305. The cubic root of 121618612 is about 495.4502070122.

The spelling of 121618612 in words is "one hundred twenty-one million, six hundred eighteen thousand, six hundred twelve".