222121002112111 has 2 divisors, whose sum is σ = 222121002112112. Its totient is φ = 222121002112110.

The previous prime is 222121002112091. The next prime is 222121002112157. The reversal of 222121002112111 is 111211200121222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222121002112111 - 2²⁵ = 222120968557679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222121002112181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111060501056055 + 111060501056056.

It is an arithmetic number, because the mean of its divisors is an integer number (111060501056056).

Almost surely, 2^{222121002112111} is an apocalyptic number.

222121002112111 is a deficient number, since it is larger than the sum of its proper divisors (1).

222121002112111 is an equidigital number, since it uses as much as digits as its factorization.

222121002112111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 222121002112111 its reverse (111211200121222), we get a palindrome (333332202233333).

The spelling of 222121002112111 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two million, one hundred twelve thousand, one hundred eleven".