121091121 has 24 divisors (see below), whose sum is σ = 181950080. Its totient is φ = 77534496.

The previous prime is 121091083. The next prime is 121091137. The reversal of 121091121 is 121190121.

It is a happy number.

It is not a de Polignac number, because 121091121 - 2⁶ = 121091057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121091094 and 121091103.

It is not an unprimeable number, because it can be changed into a prime (121091171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24006 + ... + 28608.

Almost surely, 2^121091121 is an apocalyptic number.

It is an amenable number.

121091121 is a deficient number, since it is larger than the sum of its proper divisors (60858959).

121091121 is a wasteful number, since it uses less digits than its factorization.

121091121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4725 (or 4722 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 121091121 is about 11004.1410841555. The cubic root of 121091121 is about 494.7328708669.

The spelling of 121091121 in words is "one hundred twenty-one million, ninety-one thousand, one hundred twenty-one".