111122421 has 16 divisors (see below), whose sum is σ = 157320000. Its totient is φ = 69527808.

The previous prime is 111122413. The next prime is 111122441. The reversal of 111122421 is 124221111.

It is not a de Polignac number, because 111122421 - 2³ = 111122413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111122421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16455 + ... + 22203.

It is an arithmetic number, because the mean of its divisors is an integer number (9832500).

Almost surely, 2^111122421 is an apocalyptic number.

It is an amenable number.

111122421 is a deficient number, since it is larger than the sum of its proper divisors (46197579).

111122421 is a wasteful number, since it uses less digits than its factorization.

111122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148.

The product of its digits is 32, while the sum is 15.

The square root of 111122421 is about 10541.4619953781. The cubic root of 111122421 is about 480.7661678981.

Adding to 111122421 its reverse (124221111), we get a palindrome (235343532).

It can be divided in two parts, 1111 and 22421, that added together give a palindrome (23532).

The spelling of 111122421 in words is "one hundred eleven million, one hundred twenty-two thousand, four hundred twenty-one".