121152091 has 4 divisors (see below), whose sum is σ = 121175992. Its totient is φ = 121128192.

The previous prime is 121152079. The next prime is 121152103. The reversal of 121152091 is 190251121.

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

It is an interprime number because it is at equal distance from previous prime (121152079) and next prime (121152103).

It is a cyclic number.

It is not a de Polignac number, because 121152091 - 2⁷ = 121151963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121152491) 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, 1005 + ... + 15598.

It is an arithmetic number, because the mean of its divisors is an integer number (30293998).

Almost surely, 2^121152091 is an apocalyptic number.

121152091 is a deficient number, since it is larger than the sum of its proper divisors (23901).

121152091 is an equidigital number, since it uses as much as digits as its factorization.

121152091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23900.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 121152091 is about 11006.9110562410. The cubic root of 121152091 is about 494.8158904468.

The spelling of 121152091 in words is "one hundred twenty-one million, one hundred fifty-two thousand, ninety-one".