2100020221111 has 4 divisors (see below), whose sum is σ = 2100132594424. Its totient is φ = 2099907847800.

The previous prime is 2100020221109. The next prime is 2100020221193. The reversal of 2100020221111 is 1111220200012.

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 2100020221111 - 2¹ = 2100020221109 is a prime.

It is a super-4 number, since 4×2100020221111⁴ (a number of 50 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100020221091 and 2100020221100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100020291111) 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, 56158620 + ... + 56196001.

It is an arithmetic number, because the mean of its divisors is an integer number (525033148606).

Almost surely, 2^{2100020221111} is an apocalyptic number.

2100020221111 is a deficient number, since it is larger than the sum of its proper divisors (112373313).

2100020221111 is a wasteful number, since it uses less digits than its factorization.

2100020221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112373312.

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

Adding to 2100020221111 its reverse (1111220200012), we get a palindrome (3211240421123).

The spelling of 2100020221111 in words is "two trillion, one hundred billion, twenty million, two hundred twenty-one thousand, one hundred eleven".