2111111220221 has 8 divisors (see below), whose sum is σ = 2134893983040. Its totient is φ = 2087329844512.

The previous prime is 2111111220209. The next prime is 2111111220263. The reversal of 2111111220221 is 1220221111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111111220221 - 2²² = 2111107025917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111111220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111111226221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2882696 + ... + 3540078.

It is an arithmetic number, because the mean of its divisors is an integer number (266861747880).

Almost surely, 2^{2111111220221} is an apocalyptic number.

It is an amenable number.

2111111220221 is a deficient number, since it is larger than the sum of its proper divisors (23782762819).

2111111220221 is an equidigital number, since it uses as much as digits as its factorization.

2111111220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693555.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2111111220221 its reverse (1220221111112), we get a palindrome (3331332331333).

It can be divided in two parts, 2111111 and 220221, that added together give a palindrome (2331332).

The spelling of 2111111220221 in words is "two trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-one".