2221002111221 has 8 divisors (see below), whose sum is σ = 2475420310080. Its totient is φ = 1980336247488.

The previous prime is 2221002111199. The next prime is 2221002111247. The reversal of 2221002111221 is 1221112001222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2221002111221 - 2¹⁴ = 2221002094837 is a prime.

It is a super-2 number, since 2×2221002111221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221002111221.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3438083441 + ... + 3438084086.

It is an arithmetic number, because the mean of its divisors is an integer number (309427538760).

Almost surely, 2^{2221002111221} is an apocalyptic number.

It is an amenable number.

2221002111221 is a deficient number, since it is larger than the sum of its proper divisors (254418198859).

2221002111221 is a wasteful number, since it uses less digits than its factorization.

2221002111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876167563.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2221002111221 its reverse (1221112001222), we get a palindrome (3442114112443).

The spelling of 2221002111221 in words is "two trillion, two hundred twenty-one billion, two million, one hundred eleven thousand, two hundred twenty-one".