21323330220212 has 12 divisors (see below), whose sum is σ = 37352664840036. Its totient is φ = 10651140265920.

The previous prime is 21323330220209. The next prime is 21323330220259. The reversal of 21323330220212 is 21202203332312.

It can be written as a sum of positive squares in 2 ways, for example, as 2552721980176 + 18770608240036 = 1597724^2 + 4332506^2 .

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, 2631206489 + ... + 2631214592.

It is an arithmetic number, because the mean of its divisors is an integer number (3112722070003).

Almost surely, 2^{21323330220212} is an apocalyptic number.

It is an amenable number.

21323330220212 is a deficient number, since it is larger than the sum of its proper divisors (16029334619824).

21323330220212 is a wasteful number, since it uses less digits than its factorization.

21323330220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262422098 (or 5262422096 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 21323330220212 its reverse (21202203332312), we get a palindrome (42525533552524).

The spelling of 21323330220212 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty million, two hundred twenty thousand, two hundred twelve".