2211112212221 has 32 divisors (see below), whose sum is σ = 2569492869120. Its totient is φ = 1881572328000.

The previous prime is 2211112212217. The next prime is 2211112212229. The reversal of 2211112212221 is 1222122111122.

2211112212221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2211112212221 - 2² = 2211112212217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211112212193 and 2211112212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211112212229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10172540 + ... + 10387626.

It is an arithmetic number, because the mean of its divisors is an integer number (80296652160).

Almost surely, 2^{2211112212221} is an apocalyptic number.

It is an amenable number.

2211112212221 is a deficient number, since it is larger than the sum of its proper divisors (358380656899).

2211112212221 is a wasteful number, since it uses less digits than its factorization.

2211112212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215705.

The product of its digits is 128, while the sum is 20.

Adding to 2211112212221 its reverse (1222122111122), we get a palindrome (3433234323343).

The spelling of 2211112212221 in words is "two trillion, two hundred eleven billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty-one".