21133143203 has 4 divisors (see below), whose sum is σ = 21531881808. Its totient is φ = 20734404600.

The previous prime is 21133143191. The next prime is 21133143209. The reversal of 21133143203 is 30234133112.

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 21133143203 - 2³⁴ = 3953274019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21133143209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199369223 + ... + 199369328.

It is an arithmetic number, because the mean of its divisors is an integer number (5382970452).

Almost surely, 2^21133143203 is an apocalyptic number.

21133143203 is a deficient number, since it is larger than the sum of its proper divisors (398738605).

21133143203 is an equidigital number, since it uses as much as digits as its factorization.

21133143203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398738604.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21133143203 its reverse (30234133112), we get a palindrome (51367276315).

The spelling of 21133143203 in words is "twenty-one billion, one hundred thirty-three million, one hundred forty-three thousand, two hundred three".