221111121103 has 2 divisors, whose sum is σ = 221111121104. Its totient is φ = 221111121102.

The previous prime is 221111121089. The next prime is 221111121157. The reversal of 221111121103 is 301121111122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221111121103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111122103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555560551 + 110555560552.

It is an arithmetic number, because the mean of its divisors is an integer number (110555560552).

Almost surely, 2^221111121103 is an apocalyptic number.

221111121103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111121103 is an equidigital number, since it uses as much as digits as its factorization.

221111121103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 221111121103 its reverse (301121111122), we get a palindrome (522232232225).

The spelling of 221111121103 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred three".