121306242053 has 4 divisors (see below), whose sum is σ = 121314867360. Its totient is φ = 121297616748.

The previous prime is 121306242019. The next prime is 121306242067. The reversal of 121306242053 is 350242603121.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 350242603121 = 389 ⋅900366589.

It is a cyclic number.

It is not a de Polignac number, because 121306242053 - 2³⁶ = 52586765317 is a prime.

It is a super-2 number, since 2×121306242053² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121306242853) 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, 4291523 + ... + 4319696.

It is an arithmetic number, because the mean of its divisors is an integer number (30328716840).

Almost surely, 2^121306242053 is an apocalyptic number.

It is an amenable number.

121306242053 is a deficient number, since it is larger than the sum of its proper divisors (8625307).

121306242053 is an equidigital number, since it uses as much as digits as its factorization.

121306242053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8625306.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 121306242053 its reverse (350242603121), we get a palindrome (471548845174).

The spelling of 121306242053 in words is "one hundred twenty-one billion, three hundred six million, two hundred forty-two thousand, fifty-three".