2221221111211 has 4 divisors (see below), whose sum is σ = 2263130943552. Its totient is φ = 2179311278872.

The previous prime is 2221221111203. The next prime is 2221221111227. The reversal of 2221221111211 is 1121111221222.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2221221111211 - 2³ = 2221221111203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251221111211) 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, 20954916091 + ... + 20954916196.

It is an arithmetic number, because the mean of its divisors is an integer number (565782735888).

Almost surely, 2^{2221221111211} is an apocalyptic number.

2221221111211 is a deficient number, since it is larger than the sum of its proper divisors (41909832341).

2221221111211 is an equidigital number, since it uses as much as digits as its factorization.

2221221111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41909832340.

The product of its digits is 64, while the sum is 19.

Adding to 2221221111211 its reverse (1121111221222), we get a palindrome (3342332332433).

The spelling of 2221221111211 in words is "two trillion, two hundred twenty-one billion, two hundred twenty-one million, one hundred eleven thousand, two hundred eleven".