121007091 has 4 divisors (see below), whose sum is σ = 161342792. Its totient is φ = 80671392.

The previous prime is 121007083. The next prime is 121007101. The reversal of 121007091 is 190700121.

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

It is not a de Polignac number, because 121007091 - 2³ = 121007083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121007011) 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, 20167846 + ... + 20167851.

It is an arithmetic number, because the mean of its divisors is an integer number (40335698).

Almost surely, 2^121007091 is an apocalyptic number.

121007091 is a deficient number, since it is larger than the sum of its proper divisors (40335701).

121007091 is an equidigital number, since it uses as much as digits as its factorization.

121007091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40335700.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 121007091 is about 11000.3223134597. The cubic root of 121007091 is about 494.6184060386.

It can be divided in two parts, 12100 and 7091, that added together give a palindrome (19191).

The spelling of 121007091 in words is "one hundred twenty-one million, seven thousand, ninety-one".