2100121102009 has 8 divisors (see below), whose sum is σ = 2445424032960. Its totient is φ = 1766139578736.

The previous prime is 2100121101997. The next prime is 2100121102099. The reversal of 2100121102009 is 9002011210012.

It is a happy number.

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 2100121102009 - 2¹³ = 2100121093817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100121102099) 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, 2830351519 + ... + 2830352260.

It is an arithmetic number, because the mean of its divisors is an integer number (305678004120).

Almost surely, 2^{2100121102009} is an apocalyptic number.

It is an amenable number.

2100121102009 is a deficient number, since it is larger than the sum of its proper divisors (345302930951).

2100121102009 is an equidigital number, since it uses as much as digits as its factorization.

2100121102009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660703839.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 2100121102009 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred two thousand, nine".