2100000021211 has 4 divisors (see below), whose sum is σ = 2100136746424. Its totient is φ = 2099863296000.

The previous prime is 2100000021193. The next prime is 2100000021281. The reversal of 2100000021211 is 1121200000012.

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 2100000021211 - 2⁷ = 2100000021083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100000021281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68339565 + ... + 68370286.

It is an arithmetic number, because the mean of its divisors is an integer number (525034186606).

Almost surely, 2^{2100000021211} is an apocalyptic number.

2100000021211 is a deficient number, since it is larger than the sum of its proper divisors (136725213).

2100000021211 is a wasteful number, since it uses less digits than its factorization.

2100000021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136725212.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2100000021211 its reverse (1121200000012), we get a palindrome (3221200021223).

The spelling of 2100000021211 in words is "two trillion, one hundred billion, twenty-one thousand, two hundred eleven".