1321103143 has 4 divisors (see below), whose sum is σ = 1321877880. Its totient is φ = 1320328408.

The previous prime is 1321103137. The next prime is 1321103171. The reversal of 1321103143 is 3413011231.

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 1321103143 - 2⁵ = 1321103111 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 1321103143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321103543) 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, 384805 + ... + 388222.

It is an arithmetic number, because the mean of its divisors is an integer number (330469470).

Almost surely, 2^1321103143 is an apocalyptic number.

1321103143 is a deficient number, since it is larger than the sum of its proper divisors (774737).

1321103143 is an equidigital number, since it uses as much as digits as its factorization.

1321103143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774736.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1321103143 is about 36346.9825845283. The cubic root of 1321103143 is about 1097.2668075185.

Adding to 1321103143 its reverse (3413011231), we get a palindrome (4734114374).

The spelling of 1321103143 in words is "one billion, three hundred twenty-one million, one hundred three thousand, one hundred forty-three".