2111200010221 has 4 divisors (see below), whose sum is σ = 2151033972732. Its totient is φ = 2071366047712.

The previous prime is 2111200010189. The next prime is 2111200010267. The reversal of 2111200010221 is 1220100021112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1910092607721 + 201107402500 = 1382061^2 + 448450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111200010221 - 2⁵ = 2111200010189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111200010021) 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, 19916981176 + ... + 19916981281.

It is an arithmetic number, because the mean of its divisors is an integer number (537758493183).

Almost surely, 2^{2111200010221} is an apocalyptic number.

It is an amenable number.

2111200010221 is a deficient number, since it is larger than the sum of its proper divisors (39833962511).

2111200010221 is an equidigital number, since it uses as much as digits as its factorization.

2111200010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39833962510.

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

Adding to 2111200010221 its reverse (1220100021112), we get a palindrome (3331300031333).

The spelling of 2111200010221 in words is "two trillion, one hundred eleven billion, two hundred million, ten thousand, two hundred twenty-one".