2100122010209 has 4 divisors (see below), whose sum is σ = 2100148626480. Its totient is φ = 2100095393940.

The previous prime is 2100122010109. The next prime is 2100122010227. The reversal of 2100122010209 is 9020102210012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2100122010209 - 2²⁴ = 2100105232993 is a prime.

It is a super-2 number, since 2×2100122010209² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100122010289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13189427 + ... + 13347704.

It is an arithmetic number, because the mean of its divisors is an integer number (525037156620).

Almost surely, 2^{2100122010209} is an apocalyptic number.

It is an amenable number.

2100122010209 is a deficient number, since it is larger than the sum of its proper divisors (26616271).

2100122010209 is an equidigital number, since it uses as much as digits as its factorization.

2100122010209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26616270.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 2100122010209 in words is "two trillion, one hundred billion, one hundred twenty-two million, ten thousand, two hundred nine".