21132222242 has 4 divisors (see below), whose sum is σ = 31698333366. Its totient is φ = 10566111120.

The previous prime is 21132222227. The next prime is 21132222299. The reversal of 21132222242 is 24222223112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10805394601 + 10326827641 = 103949^2 + 101621^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5283055559 + ... + 5283055562.

Almost surely, 2^21132222242 is an apocalyptic number.

21132222242 is a deficient number, since it is larger than the sum of its proper divisors (10566111124).

21132222242 is a wasteful number, since it uses less digits than its factorization.

21132222242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10566111123.

The product of its digits is 1536, while the sum is 23.

Adding to 21132222242 its reverse (24222223112), we get a palindrome (45354445354).

The spelling of 21132222242 in words is "twenty-one billion, one hundred thirty-two million, two hundred twenty-two thousand, two hundred forty-two".