21321323303212 has 24 divisors (see below), whose sum is σ = 37320361289792. Its totient is φ = 10658363184000.

The previous prime is 21321323303177. The next prime is 21321323303219. The reversal of 21321323303212 is 21230332312312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21321323303219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725175712 + ... + 725205112.

Almost surely, 2^{21321323303212} is an apocalyptic number.

It is an amenable number.

21321323303212 is a deficient number, since it is larger than the sum of its proper divisors (15999037986580).

21321323303212 is a wasteful number, since it uses less digits than its factorization.

21321323303212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62329 (or 62327 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21321323303212 its reverse (21230332312312), we get a palindrome (42551655615524).

The spelling of 21321323303212 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twenty-three million, three hundred three thousand, two hundred twelve".