121892091 has 16 divisors (see below), whose sum is σ = 174908448. Its totient is φ = 75225600.

The previous prime is 121892063. The next prime is 121892107. The reversal of 121892091 is 190298121.

It is not a de Polignac number, because 121892091 - 2⁵ = 121892059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121892021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16480 + ... + 22701.

It is an arithmetic number, because the mean of its divisors is an integer number (10931778).

Almost surely, 2^121892091 is an apocalyptic number.

121892091 is a deficient number, since it is larger than the sum of its proper divisors (53016357).

121892091 is a wasteful number, since it uses less digits than its factorization.

121892091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39262.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 121892091 is about 11040.4751256456. The cubic root of 121892091 is about 495.8212954794.

The spelling of 121892091 in words is "one hundred twenty-one million, eight hundred ninety-two thousand, ninety-one".