111921503 has 2 divisors, whose sum is σ = 111921504. Its totient is φ = 111921502.

The previous prime is 111921497. The next prime is 111921521. The reversal of 111921503 is 305129111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111921503 - 2⁴ = 111921487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111921583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55960751 + 55960752.

It is an arithmetic number, because the mean of its divisors is an integer number (55960752).

Almost surely, 2^111921503 is an apocalyptic number.

111921503 is a deficient number, since it is larger than the sum of its proper divisors (1).

111921503 is an equidigital number, since it uses as much as digits as its factorization.

111921503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 111921503 is about 10579.2959595618. The cubic root of 111921503 is about 481.9158140534.

It can be divided in two parts, 1119 and 21503, that added together give a palindrome (22622).

The spelling of 111921503 in words is "one hundred eleven million, nine hundred twenty-one thousand, five hundred three".