2221111120221 has 20 divisors (see below), whose sum is σ = 3791949849952. Its totient is φ = 1269206354088.

The previous prime is 2221111120181. The next prime is 2221111120229. The reversal of 2221111120221 is 1220211111222.

2221111120221 is a `hidden beast` number, since 222 + 111 + 112 + 0 + 221 = 666.

It is not a de Polignac number, because 2221111120221 - 2⁶ = 2221111120157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221111120194 and 2221111120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221111120229) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1958651215 + ... + 1958652348.

Almost surely, 2^{2221111120221} is an apocalyptic number.

2221111120221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2221111120221 is a deficient number, since it is larger than the sum of its proper divisors (1570838729731).

2221111120221 is an equidigital number, since it uses as much as digits as its factorization.

2221111120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3917303582 (or 3917303573 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2221111120221 its reverse (1220211111222), we get a palindrome (3441322231443).

The spelling of 2221111120221 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, one hundred twenty thousand, two hundred twenty-one".