121111097 has 4 divisors (see below), whose sum is σ = 121258020. Its totient is φ = 120964176.

The previous prime is 121111093. The next prime is 121111103. The reversal of 121111097 is 790111121.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103713856 + 17397241 = 10184^2 + 4171^2 .

It is a cyclic number.

It is not a de Polignac number, because 121111097 - 2² = 121111093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72218 + ... + 73875.

It is an arithmetic number, because the mean of its divisors is an integer number (30314505).

Almost surely, 2^121111097 is an apocalyptic number.

It is an amenable number.

121111097 is a deficient number, since it is larger than the sum of its proper divisors (146923).

121111097 is an equidigital number, since it uses as much as digits as its factorization.

121111097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146922.

The product of its (nonzero) digits is 126, while the sum is 23.

The square root of 121111097 is about 11005.0487050263. The cubic root of 121111097 is about 494.7600741838.

The spelling of 121111097 in words is "one hundred twenty-one million, one hundred eleven thousand, ninety-seven".