121928916 has 48 divisors (see below), whose sum is σ = 295223040. Its totient is φ = 39137280.

The previous prime is 121928899. The next prime is 121928923. The reversal of 121928916 is 619829121.

121928916 = T₁₉₃ + T₁₉₄ + ... + T₉₀₃.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37300 + ... + 40436.

It is an arithmetic number, because the mean of its divisors is an integer number (6150480).

Almost surely, 2^121928916 is an apocalyptic number.

It is an amenable number.

121928916 is an abundant number, since it is smaller than the sum of its proper divisors (173294124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121928916 is a wasteful number, since it uses less digits than its factorization.

121928916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264 (or 3262 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 121928916 is about 11042.1427268443. The cubic root of 121928916 is about 495.8712215538.

It can be divided in two parts, 1219 and 28916, that added together give a triangular number (30135 = T₂₄₅).

The spelling of 121928916 in words is "one hundred twenty-one million, nine hundred twenty-eight thousand, nine hundred sixteen".