2221110022221 has 12 divisors (see below), whose sum is σ = 3282880963648. Its totient is φ = 1446304200264.

The previous prime is 2221110022207. The next prime is 2221110022331. The reversal of 2221110022221 is 1222200111222.

It is a happy number.

It is not a de Polignac number, because 2221110022221 - 2²⁶ = 2221042913357 is a prime.

It is a super-2 number, since 2×2221110022221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221110022194 and 2221110022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221110022921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2869650805 + ... + 2869651578.

Almost surely, 2^{2221110022221} is an apocalyptic number.

It is an amenable number.

2221110022221 is a deficient number, since it is larger than the sum of its proper divisors (1061770941427).

2221110022221 is a wasteful number, since it uses less digits than its factorization.

2221110022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5739302432 (or 5739302429 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2221110022221 its reverse (1222200111222), we get a palindrome (3443310133443).

The spelling of 2221110022221 in words is "two trillion, two hundred twenty-one billion, one hundred ten million, twenty-two thousand, two hundred twenty-one".