121333413121 has 4 divisors (see below), whose sum is σ = 121373367892. Its totient is φ = 121293458352.

The previous prime is 121333413053. The next prime is 121333413137. The reversal of 121333413121 is 121314333121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121314333121 = 229519 ⋅528559.

It can be written as a sum of positive squares in 2 ways, for example, as 44168906896 + 77164506225 = 210164^2 + 277785^2 .

It is a cyclic number.

It is not a de Polignac number, because 121333413121 - 2⁹ = 121333412609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121333413161) 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, 19972830 + ... + 19978903.

It is an arithmetic number, because the mean of its divisors is an integer number (30343341973).

Almost surely, 2^121333413121 is an apocalyptic number.

It is an amenable number.

121333413121 is a deficient number, since it is larger than the sum of its proper divisors (39954771).

121333413121 is an equidigital number, since it uses as much as digits as its factorization.

121333413121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39954770.

The product of its digits is 1296, while the sum is 25.

Adding to 121333413121 its reverse (121314333121), we get a palindrome (242647746242).

The spelling of 121333413121 in words is "one hundred twenty-one billion, three hundred thirty-three million, four hundred thirteen thousand, one hundred twenty-one".