2211120120221 has 4 divisors (see below), whose sum is σ = 2282446575744. Its totient is φ = 2139793664700.

The previous prime is 2211120120061. The next prime is 2211120120239. The reversal of 2211120120221 is 1220210211122.

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 2211120120221 - 2²⁶ = 2211053011357 is a prime.

It is a super-2 number, since 2×2211120120221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211120120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211120120721) 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, 35663227715 + ... + 35663227776.

It is an arithmetic number, because the mean of its divisors is an integer number (570611643936).

Almost surely, 2^{2211120120221} is an apocalyptic number.

It is an amenable number.

2211120120221 is a deficient number, since it is larger than the sum of its proper divisors (71326455523).

2211120120221 is an equidigital number, since it uses as much as digits as its factorization.

2211120120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71326455522.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2211120120221 its reverse (1220210211122), we get a palindrome (3431330331343).

Subtracting from 2211120120221 its reverse (1220210211122), we obtain a palindrome (990909909099).

The spelling of 2211120120221 in words is "two trillion, two hundred eleven billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty-one".