121040121 has 4 divisors (see below), whose sum is σ = 161386832. Its totient is φ = 80693412.

The previous prime is 121040111. The next prime is 121040131.

It is a happy number.

121040121 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (121040111) and next prime (121040131).

It is not a de Polignac number, because 121040121 - 2²⁶ = 53931257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121040097 and 121040106.

It is not an unprimeable number, because it can be changed into a prime (121040111) 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, 20173351 + ... + 20173356.

It is an arithmetic number, because the mean of its divisors is an integer number (40346708).

Almost surely, 2^121040121 is an apocalyptic number.

It is an amenable number.

121040121 is a deficient number, since it is larger than the sum of its proper divisors (40346711).

121040121 is an equidigital number, since it uses as much as digits as its factorization.

121040121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40346710.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121040121 is about 11001.8235306698. The cubic root of 121040121 is about 494.6634054944.

The spelling of 121040121 in words is "one hundred twenty-one million, forty thousand, one hundred twenty-one".