111133243221 has 64 divisors (see below), whose sum is σ = 199256365056. Its totient is φ = 53209094400.

The previous prime is 111133243211. The next prime is 111133243259. The reversal of 111133243221 is 122342331111.

It is not a de Polignac number, because 111133243221 - 2⁶ = 111133243157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111133243191 and 111133243200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111133243211) 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 63 ways as a sum of consecutive naturals, for example, 1956990 + ... + 2012976.

It is an arithmetic number, because the mean of its divisors is an integer number (3113380704).

Almost surely, 2^111133243221 is an apocalyptic number.

111133243221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111133243221 is a deficient number, since it is larger than the sum of its proper divisors (88123121835).

111133243221 is a wasteful number, since it uses less digits than its factorization.

111133243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56682.

The product of its digits is 864, while the sum is 24.

Adding to 111133243221 its reverse (122342331111), we get a palindrome (233475574332).

The spelling of 111133243221 in words is "one hundred eleven billion, one hundred thirty-three million, two hundred forty-three thousand, two hundred twenty-one".