11220143 has 4 divisors (see below), whose sum is σ = 12240168. Its totient is φ = 10200120.

The previous prime is 11220137. The next prime is 11220149. The reversal of 11220143 is 34102211.

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

It is an interprime number because it is at equal distance from previous prime (11220137) and next prime (11220149).

It is a cyclic number.

It is not a de Polignac number, because 11220143 - 2¹⁰ = 11219119 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 (11220149) 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, 509996 + ... + 510017.

It is an arithmetic number, because the mean of its divisors is an integer number (3060042).

Almost surely, 2^11220143 is an apocalyptic number.

11220143 is a deficient number, since it is larger than the sum of its proper divisors (1020025).

11220143 is a wasteful number, since it uses less digits than its factorization.

11220143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020024.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 11220143 is about 3349.6481904821. The cubic root of 11220143 is about 223.8718375591.

Adding to 11220143 its reverse (34102211), we get a palindrome (45322354).

The spelling of 11220143 in words is "eleven million, two hundred twenty thousand, one hundred forty-three".