121491164 has 12 divisors (see below), whose sum is σ = 213883824. Its totient is φ = 60381504.

The previous prime is 121491157. The next prime is 121491203. The reversal of 121491164 is 461194121.

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, 90269 + ... + 91604.

It is an arithmetic number, because the mean of its divisors is an integer number (17823652).

Almost surely, 2^121491164 is an apocalyptic number.

It is an amenable number.

121491164 is a deficient number, since it is larger than the sum of its proper divisors (92392660).

121491164 is a wasteful number, since it uses less digits than its factorization.

121491164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182044 (or 182042 counting only the distinct ones).

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

The square root of 121491164 is about 11022.3030261375. The cubic root of 121491164 is about 495.2770805291.

The spelling of 121491164 in words is "one hundred twenty-one million, four hundred ninety-one thousand, one hundred sixty-four".