121031099999 has 8 divisors (see below), whose sum is σ = 121805173248. Its totient is φ = 120258918360.

The previous prime is 121031099993. The next prime is 121031100013. The reversal of 121031099999 is 999990130121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121031099999 - 2²⁰ = 121030051423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121031099999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121031099993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344417 + ... + 600570.

It is an arithmetic number, because the mean of its divisors is an integer number (15225646656).

Almost surely, 2^121031099999 is an apocalyptic number.

121031099999 is a deficient number, since it is larger than the sum of its proper divisors (774073249).

121031099999 is an equidigital number, since it uses as much as digits as its factorization.

121031099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945805.

The product of its (nonzero) digits is 354294, while the sum is 53.

The spelling of 121031099999 in words is "one hundred twenty-one billion, thirty-one million, ninety-nine thousand, nine hundred ninety-nine".