121423242312431 has 16 divisors (see below), whose sum is σ = 123539237184000. Its totient is φ = 119316337132608.

The previous prime is 121423242312403. The next prime is 121423242312439. The reversal of 121423242312431 is 134213242324121.

It is a cyclic number.

It is not a de Polignac number, because 121423242312431 - 2³⁰ = 121422168570607 is a prime.

It is a super-2 number, since 2×121423242312431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121423242312391 and 121423242312400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121423242312439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101745035 + ... + 102931523.

It is an arithmetic number, because the mean of its divisors is an integer number (7721202324000).

Almost surely, 2^{121423242312431} is an apocalyptic number.

121423242312431 is a deficient number, since it is larger than the sum of its proper divisors (2115994871569).

121423242312431 is a wasteful number, since it uses less digits than its factorization.

121423242312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190318.

The product of its digits is 55296, while the sum is 35.

Adding to 121423242312431 its reverse (134213242324121), we get a palindrome (255636484636552).

The spelling of 121423242312431 in words is "one hundred twenty-one trillion, four hundred twenty-three billion, two hundred forty-two million, three hundred twelve thousand, four hundred thirty-one".