21323012222 has 8 divisors (see below), whose sum is σ = 31993638672. Its totient is φ = 10658466000.

The previous prime is 21323012203. The next prime is 21323012251. The reversal of 21323012222 is 22221032312.

It is a happy number.

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

It is a super-2 number, since 2×21323012222² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21323012194 and 21323012203.

It is a congruent number.

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, 1511279 + ... + 1525322.

It is an arithmetic number, because the mean of its divisors is an integer number (3999204834).

Almost surely, 2^21323012222 is an apocalyptic number.

21323012222 is a deficient number, since it is larger than the sum of its proper divisors (10670626450).

21323012222 is a wasteful number, since it uses less digits than its factorization.

21323012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040114.

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

Adding to 21323012222 its reverse (22221032312), we get a palindrome (43544044534).

The spelling of 21323012222 in words is "twenty-one billion, three hundred twenty-three million, twelve thousand, two hundred twenty-two".