21141002143 has 4 divisors (see below), whose sum is σ = 21144379648. Its totient is φ = 21137624640.

The previous prime is 21141002131. The next prime is 21141002173. The reversal of 21141002143 is 34120014112.

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 21141002143 - 2⁹ = 21141001631 is a prime.

It is a super-2 number, since 2×21141002143² (a number of 21 digits) contains 22 as substring.

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 21141002143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141002173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1679346 + ... + 1691887.

It is an arithmetic number, because the mean of its divisors is an integer number (5286094912).

Almost surely, 2^21141002143 is an apocalyptic number.

21141002143 is a deficient number, since it is larger than the sum of its proper divisors (3377505).

21141002143 is an equidigital number, since it uses as much as digits as its factorization.

21141002143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3377504.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21141002143 its reverse (34120014112), we get a palindrome (55261016255).

The spelling of 21141002143 in words is "twenty-one billion, one hundred forty-one million, two thousand, one hundred forty-three".