2221122220111 has 2 divisors, whose sum is σ = 2221122220112. Its totient is φ = 2221122220110.

The previous prime is 2221122220099. The next prime is 2221122220133. The reversal of 2221122220111 is 1110222211222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221122220111 - 2⁹ = 2221122219599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221122220151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110561110055 + 1110561110056.

It is an arithmetic number, because the mean of its divisors is an integer number (1110561110056).

Almost surely, 2^{2221122220111} is an apocalyptic number.

2221122220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221122220111 is an equidigital number, since it uses as much as digits as its factorization.

2221122220111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2221122220111 its reverse (1110222211222), we get a palindrome (3331344431333).

The spelling of 2221122220111 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, one hundred eleven".