2100122001999 has 24 divisors (see below), whose sum is σ = 3469346316800. Its totient is φ = 1199211859728.

The previous prime is 2100122001983. The next prime is 2100122002007. The reversal of 2100122001999 is 9991002210012.

It is not a de Polignac number, because 2100122001999 - 2⁴ = 2100122001983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100122001979) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11825827 + ... + 12002100.

Almost surely, 2^{2100122001999} is an apocalyptic number.

2100122001999 is a deficient number, since it is larger than the sum of its proper divisors (1369224314801).

2100122001999 is a wasteful number, since it uses less digits than its factorization.

2100122001999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23829339 (or 23829336 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 2100122001999 in words is "two trillion, one hundred billion, one hundred twenty-two million, one thousand, nine hundred ninety-nine".