21200142003 has 4 divisors (see below), whose sum is σ = 28266856008. Its totient is φ = 14133428000.

The previous prime is 21200141947. The next prime is 21200142013. The reversal of 21200142003 is 30024100212.

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 21200142003 - 2⁶ = 21200141939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21200142013) 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, 3533356998 + ... + 3533357003.

It is an arithmetic number, because the mean of its divisors is an integer number (7066714002).

Almost surely, 2^21200142003 is an apocalyptic number.

21200142003 is a deficient number, since it is larger than the sum of its proper divisors (7066714005).

21200142003 is an equidigital number, since it uses as much as digits as its factorization.

21200142003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7066714004.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21200142003 its reverse (30024100212), we get a palindrome (51224242215).

The spelling of 21200142003 in words is "twenty-one billion, two hundred million, one hundred forty-two thousand, three".