11143343421 has 160 divisors (see below), whose sum is σ = 21048811520. Its totient is φ = 5731689600.

The previous prime is 11143343417. The next prime is 11143343423. The reversal of 11143343421 is 12434334111.

It is not a de Polignac number, because 11143343421 - 2² = 11143343417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143343423) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 20371470 + ... + 20372016.

It is an arithmetic number, because the mean of its divisors is an integer number (131555072).

Almost surely, 2^11143343421 is an apocalyptic number.

It is an amenable number.

11143343421 is a deficient number, since it is larger than the sum of its proper divisors (9905468099).

11143343421 is a wasteful number, since it uses less digits than its factorization.

11143343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 668 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 11143343421 its reverse (12434334111), we get a palindrome (23577677532).

The spelling of 11143343421 in words is "eleven billion, one hundred forty-three million, three hundred forty-three thousand, four hundred twenty-one".