21012132203 has 8 divisors (see below), whose sum is σ = 21318835200. Its totient is φ = 20706447528.

The previous prime is 21012132181. The next prime is 21012132233. The reversal of 21012132203 is 30223121012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21012132203 - 2¹⁸ = 21011870059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012132233) 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 7 ways as a sum of consecutive naturals, for example, 212963 + ... + 295596.

It is an arithmetic number, because the mean of its divisors is an integer number (2664854400).

Almost surely, 2^21012132203 is an apocalyptic number.

21012132203 is a deficient number, since it is larger than the sum of its proper divisors (306702997).

21012132203 is an equidigital number, since it uses as much as digits as its factorization.

21012132203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509161.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21012132203 its reverse (30223121012), we get a palindrome (51235253215).

The spelling of 21012132203 in words is "twenty-one billion, twelve million, one hundred thirty-two thousand, two hundred three".