111721427 has 16 divisors (see below), whose sum is σ = 120238080. Its totient is φ = 103572000.

The previous prime is 111721417. The next prime is 111721429. The reversal of 111721427 is 724127111.

It is a cyclic number.

It is not a de Polignac number, because 111721427 - 2¹⁰ = 111720403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111721396 and 111721405.

It is not an unprimeable number, because it can be changed into a prime (111721429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135338 + ... + 136160.

It is an arithmetic number, because the mean of its divisors is an integer number (7514880).

Almost surely, 2^111721427 is an apocalyptic number.

111721427 is a deficient number, since it is larger than the sum of its proper divisors (8516653).

111721427 is a wasteful number, since it uses less digits than its factorization.

111721427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034.

The product of its digits is 784, while the sum is 26.

The square root of 111721427 is about 10569.8357130090. The cubic root of 111721427 is about 481.6284778467.

Adding to 111721427 its reverse (724127111), we get a palindrome (835848538).

The spelling of 111721427 in words is "one hundred eleven million, seven hundred twenty-one thousand, four hundred twenty-seven".