2221323121111 has 2 divisors, whose sum is σ = 2221323121112. Its totient is φ = 2221323121110.

The previous prime is 2221323121109. The next prime is 2221323121117. The reversal of 2221323121111 is 1111213231222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221323121111 - 2¹ = 2221323121109 is a prime.

Together with 2221323121109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221323121117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110661560555 + 1110661560556.

It is an arithmetic number, because the mean of its divisors is an integer number (1110661560556).

Almost surely, 2^{2221323121111} is an apocalyptic number.

2221323121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221323121111 is an equidigital number, since it uses as much as digits as its factorization.

2221323121111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

Adding to 2221323121111 its reverse (1111213231222), we get a palindrome (3332536352333).

It can be divided in two parts, 22213231211 and 11, that added together give a palindrome (22213231222).

The spelling of 2221323121111 in words is "two trillion, two hundred twenty-one billion, three hundred twenty-three million, one hundred twenty-one thousand, one hundred eleven".