221112403 has 2 divisors, whose sum is σ = 221112404. Its totient is φ = 221112402.

The previous prime is 221112391. The next prime is 221112413. The reversal of 221112403 is 304211122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221112403 - 2²⁵ = 187557971 is a prime.

It is not a weakly prime, because it can be changed into another prime (221112413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556201 + 110556202.

It is an arithmetic number, because the mean of its divisors is an integer number (110556202).

Almost surely, 2^221112403 is an apocalyptic number.

221112403 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112403 is an equidigital number, since it uses as much as digits as its factorization.

221112403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 221112403 is about 14869.8487887403. The cubic root of 221112403 is about 604.6968433141.

Adding to 221112403 its reverse (304211122), we get a palindrome (525323525).

The spelling of 221112403 in words is "two hundred twenty-one million, one hundred twelve thousand, four hundred three".