121816444216 has 16 divisors (see below), whose sum is σ = 228414022200. Its totient is φ = 60906038304.

The previous prime is 121816444199. The next prime is 121816444231. The reversal of 121816444216 is 612444618121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22371 + ... + 494098.

Almost surely, 2^121816444216 is an apocalyptic number.

It is an amenable number.

121816444216 is a deficient number, since it is larger than the sum of its proper divisors (106597577984).

121816444216 is a wasteful number, since it uses less digits than its factorization.

121816444216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545958 (or 545954 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The spelling of 121816444216 in words is "one hundred twenty-one billion, eight hundred sixteen million, four hundred forty-four thousand, two hundred sixteen".