2222002211221 has 4 divisors (see below), whose sum is σ = 2392925458252. Its totient is φ = 2051078964192.

The previous prime is 2222002211213. The next prime is 2222002211263. The reversal of 2222002211221 is 1221122002222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1435036284900 + 786965926321 = 1197930^2 + 887111^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222002211221 - 2³ = 2222002211213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222002211521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85461623496 + ... + 85461623521.

It is an arithmetic number, because the mean of its divisors is an integer number (598231364563).

Almost surely, 2^{2222002211221} is an apocalyptic number.

It is an amenable number.

2222002211221 is a deficient number, since it is larger than the sum of its proper divisors (170923247031).

2222002211221 is a wasteful number, since it uses less digits than its factorization.

2222002211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170923247030.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2222002211221 its reverse (1221122002222), we get a palindrome (3443124213443).

The spelling of 2222002211221 in words is "two trillion, two hundred twenty-two billion, two million, two hundred eleven thousand, two hundred twenty-one".