121231091 has 8 divisors (see below), whose sum is σ = 126618144. Its totient is φ = 115853760.

The previous prime is 121231079. The next prime is 121231093. The reversal of 121231091 is 190132121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121231091 - 2²⁶ = 54122227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121231093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36521 + ... + 39701.

It is an arithmetic number, because the mean of its divisors is an integer number (15827268).

Almost surely, 2^121231091 is an apocalyptic number.

121231091 is a deficient number, since it is larger than the sum of its proper divisors (5387053).

121231091 is a wasteful number, since it uses less digits than its factorization.

121231091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4861.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 121231091 is about 11010.4991258344. The cubic root of 121231091 is about 494.9234190953.

The spelling of 121231091 in words is "one hundred twenty-one million, two hundred thirty-one thousand, ninety-one".