2100121099 has 8 divisors (see below), whose sum is σ = 2203542432. Its totient is φ = 1997709120.

The previous prime is 2100121081. The next prime is 2100121103. The reversal of 2100121099 is 9901210012.

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 2100121099 - 2⁹ = 2100120587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100121039) 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 7 ways as a sum of consecutive naturals, for example, 248074 + ... + 256399.

It is an arithmetic number, because the mean of its divisors is an integer number (275442804).

Almost surely, 2^2100121099 is an apocalyptic number.

2100121099 is a deficient number, since it is larger than the sum of its proper divisors (103421333).

2100121099 is a wasteful number, since it uses less digits than its factorization.

2100121099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504677.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 2100121099 is about 45827.0782289249. The cubic root of 2100121099 is about 1280.6037798884.

The spelling of 2100121099 in words is "two billion, one hundred million, one hundred twenty-one thousand, ninety-nine".