121101320999 has 4 divisors (see below), whose sum is σ = 121102385664. Its totient is φ = 121100256336.

The previous prime is 121101320987. The next prime is 121101321007. The reversal of 121101320999 is 999023101121.

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, and also an emirpimes, since its reverse is a distinct semiprime: 999023101121 = 30661 ⋅32582861.

It is a cyclic number.

It is not a de Polignac number, because 121101320999 - 2⁴ = 121101320983 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 (121101320939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338087 + ... + 597080.

It is an arithmetic number, because the mean of its divisors is an integer number (30275596416).

Almost surely, 2^121101320999 is an apocalyptic number.

121101320999 is a deficient number, since it is larger than the sum of its proper divisors (1064665).

121101320999 is an equidigital number, since it uses as much as digits as its factorization.

121101320999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064664.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 121101320999 in words is "one hundred twenty-one billion, one hundred one million, three hundred twenty thousand, nine hundred ninety-nine".