121361816 has 32 divisors (see below), whose sum is σ = 240596400. Its totient is φ = 57231360.

The previous prime is 121361803. The next prime is 121361831. The reversal of 121361816 is 618163121.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34976 + ... + 38288.

Almost surely, 2^121361816 is an apocalyptic number.

It is an amenable number.

121361816 is a deficient number, since it is larger than the sum of its proper divisors (119234584).

121361816 is a wasteful number, since it uses less digits than its factorization.

121361816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3579 (or 3575 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 121361816 is about 11016.4339057610. The cubic root of 121361816 is about 495.1012492271.

The spelling of 121361816 in words is "one hundred twenty-one million, three hundred sixty-one thousand, eight hundred sixteen".