21242232322 has 4 divisors (see below), whose sum is σ = 31863348486. Its totient is φ = 10621116160.

The previous prime is 21242232293. The next prime is 21242232353. The reversal of 21242232322 is 22323224212.

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., 21141450801 + 100781521 = 145401^2 + 10039^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310558079 + ... + 5310558082.

Almost surely, 2^21242232322 is an apocalyptic number.

21242232322 is a deficient number, since it is larger than the sum of its proper divisors (10621116164).

21242232322 is a wasteful number, since it uses less digits than its factorization.

21242232322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10621116163.

The product of its digits is 4608, while the sum is 25.

Adding to 21242232322 its reverse (22323224212), we get a palindrome (43565456534).

The spelling of 21242232322 in words is "twenty-one billion, two hundred forty-two million, two hundred thirty-two thousand, three hundred twenty-two".