21132122303 has 4 divisors (see below), whose sum is σ = 21133348920. Its totient is φ = 21130895688.

The previous prime is 21132122299. The next prime is 21132122311. The reversal of 21132122303 is 30322123112.

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 21132122303 - 2² = 21132122299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132122383) 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, 587093 + ... + 622046.

It is an arithmetic number, because the mean of its divisors is an integer number (5283337230).

Almost surely, 2^21132122303 is an apocalyptic number.

21132122303 is a deficient number, since it is larger than the sum of its proper divisors (1226617).

21132122303 is a wasteful number, since it uses less digits than its factorization.

21132122303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226616.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21132122303 its reverse (30322123112), we get a palindrome (51454245415).

The spelling of 21132122303 in words is "twenty-one billion, one hundred thirty-two million, one hundred twenty-two thousand, three hundred three".