111203423 has 2 divisors, whose sum is σ = 111203424. Its totient is φ = 111203422.

The previous prime is 111203401. The next prime is 111203431. The reversal of 111203423 is 324302111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111203423 - 2¹² = 111199327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111203473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55601711 + 55601712.

It is an arithmetic number, because the mean of its divisors is an integer number (55601712).

Almost surely, 2^111203423 is an apocalyptic number.

111203423 is a deficient number, since it is larger than the sum of its proper divisors (1).

111203423 is an equidigital number, since it uses as much as digits as its factorization.

111203423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 111203423 is about 10545.3033621608. The cubic root of 111203423 is about 480.8829566979.

Adding to 111203423 its reverse (324302111), we get a palindrome (435505534).

The spelling of 111203423 in words is "one hundred eleven million, two hundred three thousand, four hundred twenty-three".