121455430499 has 4 divisors (see below), whose sum is σ = 130798155936. Its totient is φ = 112112705064.

The previous prime is 121455430483. The next prime is 121455430507. The reversal of 121455430499 is 994034554121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121455430499 - 2⁴ = 121455430483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121455430409) 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, 4671362699 + ... + 4671362724.

It is an arithmetic number, because the mean of its divisors is an integer number (32699538984).

Almost surely, 2^121455430499 is an apocalyptic number.

121455430499 is a deficient number, since it is larger than the sum of its proper divisors (9342725437).

121455430499 is an equidigital number, since it uses as much as digits as its factorization.

121455430499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9342725436.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 121455430499 in words is "one hundred twenty-one billion, four hundred fifty-five million, four hundred thirty thousand, four hundred ninety-nine".