2221211202221 has 16 divisors (see below), whose sum is σ = 2506817146176. Its totient is φ = 1950526800000.

The previous prime is 2221211202173. The next prime is 2221211202251. The reversal of 2221211202221 is 1222021121222.

It is a cyclic number.

It is not a de Polignac number, because 2221211202221 - 2⁶ = 2221211202157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221211202193 and 2221211202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221211202251) 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, 24336035 + ... + 24427136.

It is an arithmetic number, because the mean of its divisors is an integer number (156676071636).

Almost surely, 2^{2221211202221} is an apocalyptic number.

It is an amenable number.

2221211202221 is a deficient number, since it is larger than the sum of its proper divisors (285605943955).

2221211202221 is a wasteful number, since it uses less digits than its factorization.

2221211202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48763324.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2221211202221 its reverse (1222021121222), we get a palindrome (3443232323443).

The spelling of 2221211202221 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred two thousand, two hundred twenty-one".