2111220100221 has 4 divisors (see below), whose sum is σ = 2814960133632. Its totient is φ = 1407480066812.

The previous prime is 2111220100217. The next prime is 2111220100261. The reversal of 2111220100221 is 1220010221112.

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 2111220100221 - 2² = 2111220100217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111220100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111220100261) 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, 351870016701 + ... + 351870016706.

It is an arithmetic number, because the mean of its divisors is an integer number (703740033408).

Almost surely, 2^{2111220100221} is an apocalyptic number.

It is an amenable number.

2111220100221 is a deficient number, since it is larger than the sum of its proper divisors (703740033411).

2111220100221 is an equidigital number, since it uses as much as digits as its factorization.

2111220100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703740033410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2111220100221 its reverse (1220010221112), we get a palindrome (3331230321333).

The spelling of 2111220100221 in words is "two trillion, one hundred eleven billion, two hundred twenty million, one hundred thousand, two hundred twenty-one".