1143110021 has 4 divisors (see below), whose sum is σ = 1154428044. Its totient is φ = 1131792000.

The previous prime is 1143109987. The next prime is 1143110069. The reversal of 1143110021 is 1200113411.

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 1012830625 + 130279396 = 31825^2 + 11414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143110021 - 2³⁰ = 69368197 is a prime.

It is a super-2 number, since 2×1143110021² = 2613401040221240882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1143109978 and 1143110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143110071) 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, 5658860 + ... + 5659061.

It is an arithmetic number, because the mean of its divisors is an integer number (288607011).

Almost surely, 2^1143110021 is an apocalyptic number.

It is an amenable number.

1143110021 is a deficient number, since it is larger than the sum of its proper divisors (11318023).

1143110021 is a wasteful number, since it uses less digits than its factorization.

1143110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11318022.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1143110021 is about 33809.9101004424. The cubic root of 1143110021 is about 1045.5930246652.

Adding to 1143110021 its reverse (1200113411), we get a palindrome (2343223432).

The spelling of 1143110021 in words is "one billion, one hundred forty-three million, one hundred ten thousand, twenty-one".