1100012143 has 4 divisors (see below), whose sum is σ = 1112371920. Its totient is φ = 1087652368.

The previous prime is 1100012141. The next prime is 1100012167. The reversal of 1100012143 is 3412100011.

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

It is a cyclic number.

It is not a de Polignac number, because 1100012143 - 2¹ = 1100012141 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 (1100012141) 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, 6179755 + ... + 6179932.

It is an arithmetic number, because the mean of its divisors is an integer number (278092980).

Almost surely, 2^1100012143 is an apocalyptic number.

1100012143 is a deficient number, since it is larger than the sum of its proper divisors (12359777).

1100012143 is an equidigital number, since it uses as much as digits as its factorization.

1100012143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12359776.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1100012143 is about 33166.4309656617. The cubic root of 1100012143 is about 1032.2839139204.

Adding to 1100012143 its reverse (3412100011), we get a palindrome (4512112154).

The spelling of 1100012143 in words is "one billion, one hundred million, twelve thousand, one hundred forty-three".