111422421 has 12 divisors (see below), whose sum is σ = 175574880. Its totient is φ = 67528680.

The previous prime is 111422411. The next prime is 111422431. The reversal of 111422421 is 124224111.

It is an interprime number because it is at equal distance from previous prime (111422411) and next prime (111422431).

It is not a de Polignac number, because 111422421 - 2⁶ = 111422357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111422394 and 111422403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111422411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 562641 + ... + 562838.

It is an arithmetic number, because the mean of its divisors is an integer number (14631240).

Almost surely, 2^111422421 is an apocalyptic number.

111422421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111422421 is a deficient number, since it is larger than the sum of its proper divisors (64152459).

111422421 is a wasteful number, since it uses less digits than its factorization.

111422421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125496 (or 1125493 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 111422421 is about 10555.6819296529. The cubic root of 111422421 is about 481.1984246522.

Adding to 111422421 its reverse (124224111), we get a palindrome (235646532).

The spelling of 111422421 in words is "one hundred eleven million, four hundred twenty-two thousand, four hundred twenty-one".