221011103 has 2 divisors, whose sum is σ = 221011104. Its totient is φ = 221011102.

The previous prime is 221011081. The next prime is 221011123. The reversal of 221011103 is 301110122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221011103 - 2⁸ = 221010847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221011123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505551 + 110505552.

It is an arithmetic number, because the mean of its divisors is an integer number (110505552).

Almost surely, 2^221011103 is an apocalyptic number.

221011103 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011103 is an equidigital number, since it uses as much as digits as its factorization.

221011103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 221011103 is about 14866.4421769299. The cubic root of 221011103 is about 604.6044843354.

Adding to 221011103 its reverse (301110122), we get a palindrome (522121225).

The spelling of 221011103 in words is "two hundred twenty-one million, eleven thousand, one hundred three".