21323212022 has 16 divisors (see below), whose sum is σ = 37445641632. Its totient is φ = 8915628480.

The previous prime is 21323212003. The next prime is 21323212039. The reversal of 21323212022 is 22021232312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21323211985 and 21323212003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18573653 + ... + 18574800.

It is an arithmetic number, because the mean of its divisors is an integer number (2340352602).

Almost surely, 2^21323212022 is an apocalyptic number.

21323212022 is a deficient number, since it is larger than the sum of its proper divisors (16122429610).

21323212022 is a wasteful number, since it uses less digits than its factorization.

21323212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37148503.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21323212022 its reverse (22021232312), we get a palindrome (43344444334).

The spelling of 21323212022 in words is "twenty-one billion, three hundred twenty-three million, two hundred twelve thousand, twenty-two".