2100021102211 has 4 divisors (see below), whose sum is σ = 2100034346392. Its totient is φ = 2100007858032.

The previous prime is 2100021102167. The next prime is 2100021102217. The reversal of 2100021102211 is 1122011200012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100021102211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100021102191 and 2100021102200.

It is not an unprimeable number, because it can be changed into a prime (2100021102217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6381330 + ... + 6702343.

It is an arithmetic number, because the mean of its divisors is an integer number (525008586598).

Almost surely, 2^{2100021102211} is an apocalyptic number.

2100021102211 is a deficient number, since it is larger than the sum of its proper divisors (13244181).

2100021102211 is a wasteful number, since it uses less digits than its factorization.

2100021102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13244180.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2100021102211 its reverse (1122011200012), we get a palindrome (3222032302223).

The spelling of 2100021102211 in words is "two trillion, one hundred billion, twenty-one million, one hundred two thousand, two hundred eleven".