21203234422 has 4 divisors (see below), whose sum is σ = 31804851636. Its totient is φ = 10601617210.

The previous prime is 21203234417. The next prime is 21203234453. The reversal of 21203234422 is 22443230212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300808604 + ... + 5300808607.

It is an arithmetic number, because the mean of its divisors is an integer number (7951212909).

Almost surely, 2^21203234422 is an apocalyptic number.

21203234422 is a deficient number, since it is larger than the sum of its proper divisors (10601617214).

21203234422 is a wasteful number, since it uses less digits than its factorization.

21203234422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10601617213.

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

Adding to 21203234422 its reverse (22443230212), we get a palindrome (43646464634).

The spelling of 21203234422 in words is "twenty-one billion, two hundred three million, two hundred thirty-four thousand, four hundred twenty-two".