222221121202111 has 2 divisors, whose sum is σ = 222221121202112. Its totient is φ = 222221121202110.

The previous prime is 222221121201941. The next prime is 222221121202127. The reversal of 222221121202111 is 111202121122222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222221121202111 - 2²⁷ = 222220986984383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222221121302111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110560601055 + 111110560601056.

It is an arithmetic number, because the mean of its divisors is an integer number (111110560601056).

Almost surely, 2^{222221121202111} is an apocalyptic number.

222221121202111 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221121202111 is an equidigital number, since it uses as much as digits as its factorization.

222221121202111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 222221121202111 its reverse (111202121122222), we get a palindrome (333423242324333).

The spelling of 222221121202111 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-one million, two hundred two thousand, one hundred eleven".