121456430879 has 18 divisors (see below), whose sum is σ = 141484488912. Its totient is φ = 103959471000.

The previous prime is 121456430869. The next prime is 121456430903. The reversal of 121456430879 is 978034654121.

It is a happy number.

It is not a de Polignac number, because 121456430879 - 2¹² = 121456426783 is a prime.

It is a super-3 number, since 3×121456430879³ (a number of 34 digits) contains 333 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 (121456430869) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 64914314 + ... + 64916184.

It is an arithmetic number, because the mean of its divisors is an integer number (7860249384).

It is a 1-persistent number, because it is pandigital, but 2⋅121456430879 = 242912861758 is not.

Almost surely, 2^121456430879 is an apocalyptic number.

121456430879 is a deficient number, since it is larger than the sum of its proper divisors (20028058033).

121456430879 is an frugal number, since it uses more digits than its factorization.

121456430879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 121456430879 in words is "one hundred twenty-one billion, four hundred fifty-six million, four hundred thirty thousand, eight hundred seventy-nine".