111143203021 has 8 divisors (see below), whose sum is σ = 111214489464. Its totient is φ = 111071946240.

The previous prime is 111143203001. The next prime is 111143203043. The reversal of 111143203021 is 120302341111.

It can be written as a sum of positive squares in 4 ways, for example, as 523768996 + 110619434025 = 22886^2 + 332595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111143203021 - 2¹⁵ = 111143170253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111143203021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111143203001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17167041 + ... + 17173513.

It is an arithmetic number, because the mean of its divisors is an integer number (13901811183).

Almost surely, 2^111143203021 is an apocalyptic number.

It is an amenable number.

111143203021 is a deficient number, since it is larger than the sum of its proper divisors (71286443).

111143203021 is an equidigital number, since it uses as much as digits as its factorization.

111143203021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14831.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111143203021 its reverse (120302341111), we get a palindrome (231445544132).

The spelling of 111143203021 in words is "one hundred eleven billion, one hundred forty-three million, two hundred three thousand, twenty-one".