111113421 has 16 divisors (see below), whose sum is σ = 150466560. Its totient is φ = 72923760.

The previous prime is 111113417. The next prime is 111113423. The reversal of 111113421 is 124311111.

It is not a de Polignac number, because 111113421 - 2² = 111113417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111113421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111113423) 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 in 15 ways as a sum of consecutive naturals, for example, 149176 + ... + 149918.

It is an arithmetic number, because the mean of its divisors is an integer number (9404160).

Almost surely, 2^111113421 is an apocalyptic number.

It is an amenable number.

111113421 is a deficient number, since it is larger than the sum of its proper divisors (39353139).

111113421 is an equidigital number, since it uses as much as digits as its factorization.

111113421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456.

The product of its digits is 24, while the sum is 15.

The square root of 111113421 is about 10541.0351009756. The cubic root of 111113421 is about 480.7531881823.

Adding to 111113421 its reverse (124311111), we get a palindrome (235424532).

The spelling of 111113421 in words is "one hundred eleven million, one hundred thirteen thousand, four hundred twenty-one".