121113403121 has 4 divisors (see below), whose sum is σ = 121177520100. Its totient is φ = 121049286144.

The previous prime is 121113403063. The next prime is 121113403123. The reversal of 121113403121 is 121304311121.

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 40266442225 + 80846960896 = 200665^2 + 284336^2 .

It is a cyclic number.

It is not a de Polignac number, because 121113403121 - 2²² = 121109208817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121113403093 and 121113403102.

It is not an unprimeable number, because it can be changed into a prime (121113403123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32055656 + ... + 32059433.

It is an arithmetic number, because the mean of its divisors is an integer number (30294380025).

Almost surely, 2^121113403121 is an apocalyptic number.

It is an amenable number.

121113403121 is a deficient number, since it is larger than the sum of its proper divisors (64116979).

121113403121 is an equidigital number, since it uses as much as digits as its factorization.

121113403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64116978.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 121113403121 its reverse (121304311121), we get a palindrome (242417714242).

The spelling of 121113403121 in words is "one hundred twenty-one billion, one hundred thirteen million, four hundred three thousand, one hundred twenty-one".