120001002101999 has 4 divisors (see below), whose sum is σ = 121644851445936. Its totient is φ = 118357152758064.

The previous prime is 120001002101867. The next prime is 120001002102011. The reversal of 120001002101999 is 999101200100021.

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 120001002101999 - 2²⁴ = 120000985324783 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 (120001002101599) 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, 821924671859 + ... + 821924672004.

It is an arithmetic number, because the mean of its divisors is an integer number (30411212861484).

Almost surely, 2^{120001002101999} is an apocalyptic number.

120001002101999 is a deficient number, since it is larger than the sum of its proper divisors (1643849343937).

120001002101999 is an equidigital number, since it uses as much as digits as its factorization.

120001002101999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643849343936.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 120001002101999 in words is "one hundred twenty trillion, one billion, two million, one hundred one thousand, nine hundred ninety-nine".