121030109999 has 4 divisors (see below), whose sum is σ = 121030903560. Its totient is φ = 121029316440.

The previous prime is 121030109983. The next prime is 121030110017. The reversal of 121030109999 is 999901030121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121030109999 - 2⁴ = 121030109983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121030109399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87809 + ... + 499770.

It is an arithmetic number, because the mean of its divisors is an integer number (30257725890).

Almost surely, 2^121030109999 is an apocalyptic number.

121030109999 is a deficient number, since it is larger than the sum of its proper divisors (793561).

121030109999 is an equidigital number, since it uses as much as digits as its factorization.

121030109999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793560.

The product of its (nonzero) digits is 39366, while the sum is 44.

The spelling of 121030109999 in words is "one hundred twenty-one billion, thirty million, one hundred nine thousand, nine hundred ninety-nine".