111234143221 has 4 divisors (see below), whose sum is σ = 111290523372. Its totient is φ = 111177763072.

The previous prime is 111234143213. The next prime is 111234143227. The reversal of 111234143221 is 122341432111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44920683025 + 66313460196 = 211945^2 + 257514^2 .

It is a cyclic number.

It is not a de Polignac number, because 111234143221 - 2³ = 111234143213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111234143227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28187116 + ... + 28191061.

It is an arithmetic number, because the mean of its divisors is an integer number (27822630843).

Almost surely, 2^111234143221 is an apocalyptic number.

It is an amenable number.

111234143221 is a deficient number, since it is larger than the sum of its proper divisors (56380151).

111234143221 is an equidigital number, since it uses as much as digits as its factorization.

111234143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56380150.

The product of its digits is 1152, while the sum is 25.

Adding to 111234143221 its reverse (122341432111), we get a palindrome (233575575332).

The spelling of 111234143221 in words is "one hundred eleven billion, two hundred thirty-four million, one hundred forty-three thousand, two hundred twenty-one".