2221002112221 has 12 divisors (see below), whose sum is σ = 3347597386848. Its totient is φ = 1416291201864.

The previous prime is 2221002112187. The next prime is 2221002112249. The reversal of 2221002112221 is 1222112001222.

It is a happy number.

2221002112221 is a `hidden beast` number, since 22 + 210 + 0 + 211 + 2 + 221 = 666.

It is not a de Polignac number, because 2221002112221 - 2⁶ = 2221002112157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221002112194 and 2221002112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221002117221) 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, 5364739195 + ... + 5364739608.

It is an arithmetic number, because the mean of its divisors is an integer number (278966448904).

Almost surely, 2^{2221002112221} is an apocalyptic number.

It is an amenable number.

2221002112221 is a deficient number, since it is larger than the sum of its proper divisors (1126595274627).

2221002112221 is a wasteful number, since it uses less digits than its factorization.

2221002112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10729478832 (or 10729478829 counting only the distinct ones).

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

Adding to 2221002112221 its reverse (1222112001222), we get a palindrome (3443114113443).

The spelling of 2221002112221 in words is "two trillion, two hundred twenty-one billion, two million, one hundred twelve thousand, two hundred twenty-one".