21212112322 has 8 divisors (see below), whose sum is σ = 31838478336. Its totient is φ = 10599286212.

The previous prime is 21212112209. The next prime is 21212112401. The reversal of 21212112322 is 22321121212.

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

It is a super-2 number, since 2×21212112322² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21212112322.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3381058 + ... + 3387325.

It is an arithmetic number, because the mean of its divisors is an integer number (3979809792).

Almost surely, 2^21212112322 is an apocalyptic number.

21212112322 is a deficient number, since it is larger than the sum of its proper divisors (10626366014).

21212112322 is a wasteful number, since it uses less digits than its factorization.

21212112322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6769952.

The product of its digits is 192, while the sum is 19.

Adding to 21212112322 its reverse (22321121212), we get a palindrome (43533233534).

The spelling of 21212112322 in words is "twenty-one billion, two hundred twelve million, one hundred twelve thousand, three hundred twenty-two".