2202111221 has 16 divisors (see below), whose sum is σ = 2277590400. Its totient is φ = 2128089600.

The previous prime is 2202111217. The next prime is 2202111239. The reversal of 2202111221 is 1221112022.

It is a cyclic number.

It is not a de Polignac number, because 2202111221 - 2² = 2202111217 is a prime.

It is a super-2 number, since 2×2202111221² = 9698587659308221682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2202111196 and 2202111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202111251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2181965 + ... + 2182973.

It is an arithmetic number, because the mean of its divisors is an integer number (142349400).

Almost surely, 2^2202111221 is an apocalyptic number.

It is an amenable number.

2202111221 is a deficient number, since it is larger than the sum of its proper divisors (75479179).

2202111221 is a wasteful number, since it uses less digits than its factorization.

2202111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2202111221 is about 46926.6578929290. The cubic root of 2202111221 is about 1301.0073495937.

Adding to 2202111221 its reverse (1221112022), we get a palindrome (3423223243).

The spelling of 2202111221 in words is "two billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".