21132302243 has 8 divisors (see below), whose sum is σ = 22758993936. Its totient is φ = 19505772000.

The previous prime is 21132302237. The next prime is 21132302281. The reversal of 21132302243 is 34220323112.

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

It is not a de Polignac number, because 21132302243 - 2⁶ = 21132302179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21132302293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480893 + ... + 522993.

It is an arithmetic number, because the mean of its divisors is an integer number (2844874242).

Almost surely, 2^21132302243 is an apocalyptic number.

21132302243 is a deficient number, since it is larger than the sum of its proper divisors (1626691693).

21132302243 is a wasteful number, since it uses less digits than its factorization.

21132302243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80725.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21132302243 its reverse (34220323112), we get a palindrome (55352625355).

The spelling of 21132302243 in words is "twenty-one billion, one hundred thirty-two million, three hundred two thousand, two hundred forty-three".