21321303201012 has 24 divisors (see below), whose sum is σ = 50189970370176. Its totient is φ = 7044206366848.

The previous prime is 21321303200999. The next prime is 21321303201013. The reversal of 21321303201012 is 21010230312312.

It is a self number, because there is not a number n which added to its sum of digits gives 21321303201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321303201013) 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, 7861836108 + ... + 7861838819.

It is an arithmetic number, because the mean of its divisors is an integer number (2091248765424).

Almost surely, 2^{21321303201012} is an apocalyptic number.

It is an amenable number.

21321303201012 is an abundant number, since it is smaller than the sum of its proper divisors (28868667169164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21321303201012 is a wasteful number, since it uses less digits than its factorization.

21321303201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15723675047 (or 15723675045 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21321303201012 its reverse (21010230312312), we get a palindrome (42331533513324).

The spelling of 21321303201012 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred three million, two hundred one thousand, twelve".