121122091 has 4 divisors (see below), whose sum is σ = 121253400. Its totient is φ = 120990784.

The previous prime is 121122073. The next prime is 121122107. The reversal of 121122091 is 190221121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121122091 - 2¹⁵ = 121089323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121122011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64261 + ... + 66118.

It is an arithmetic number, because the mean of its divisors is an integer number (30313350).

Almost surely, 2^121122091 is an apocalyptic number.

121122091 is a deficient number, since it is larger than the sum of its proper divisors (131309).

121122091 is an equidigital number, since it uses as much as digits as its factorization.

121122091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131308.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 121122091 is about 11005.5481917077. The cubic root of 121122091 is about 494.7750445370.

The spelling of 121122091 in words is "one hundred twenty-one million, one hundred twenty-two thousand, ninety-one".