111143002421 has 4 divisors (see below), whose sum is σ = 121246911744. Its totient is φ = 101039093100.

The previous prime is 111143002403. The next prime is 111143002423. The reversal of 111143002421 is 124200341111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 111143002421 - 2¹⁴ = 111142986037 is a prime.

It is a super-2 number, since 2×111143002421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111143002393 and 111143002402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111143002423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5051954645 + ... + 5051954666.

It is an arithmetic number, because the mean of its divisors is an integer number (30311727936).

Almost surely, 2^111143002421 is an apocalyptic number.

111143002421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111143002421 is a deficient number, since it is larger than the sum of its proper divisors (10103909323).

111143002421 is a wasteful number, since it uses less digits than its factorization.

111143002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10103909322.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 111143002421 its reverse (124200341111), we get a palindrome (235343343532).

The spelling of 111143002421 in words is "one hundred eleven billion, one hundred forty-three million, two thousand, four hundred twenty-one".