222120820111 has 2 divisors, whose sum is σ = 222120820112. Its totient is φ = 222120820110.

The previous prime is 222120820093. The next prime is 222120820171. The reversal of 222120820111 is 111028021222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222120820111 - 2⁷ = 222120819983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222120820171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060410055 + 111060410056.

It is an arithmetic number, because the mean of its divisors is an integer number (111060410056).

Almost surely, 2^222120820111 is an apocalyptic number.

222120820111 is a deficient number, since it is larger than the sum of its proper divisors (1).

222120820111 is an equidigital number, since it uses as much as digits as its factorization.

222120820111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 222120820111 its reverse (111028021222), we get a palindrome (333148841333).

The spelling of 222120820111 in words is "two hundred twenty-two billion, one hundred twenty million, eight hundred twenty thousand, one hundred eleven".