121121002091 has 8 divisors (see below), whose sum is σ = 125835353280. Its totient is φ = 116442501952.

The previous prime is 121121002073. The next prime is 121121002099. The reversal of 121121002091 is 190200121121.

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

It is not a de Polignac number, because 121121002091 - 2²² = 121116807787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121002099) 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, 8955875 + ... + 8969388.

It is an arithmetic number, because the mean of its divisors is an integer number (15729419160).

Almost surely, 2^121121002091 is an apocalyptic number.

121121002091 is a deficient number, since it is larger than the sum of its proper divisors (4714351189).

121121002091 is a wasteful number, since it uses less digits than its factorization.

121121002091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17925525.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 121121002091 in words is "one hundred twenty-one billion, one hundred twenty-one million, two thousand, ninety-one".