21013221300312 has 32 divisors (see below), whose sum is σ = 52533192960000. Its totient is φ = 7004388472224.

The previous prime is 21013221300311. The next prime is 21013221300317. The reversal of 21013221300312 is 21300312231012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013221300311) 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, 10387189 + ... + 12244187.

It is an arithmetic number, because the mean of its divisors is an integer number (1641662280000).

Almost surely, 2^{21013221300312} is an apocalyptic number.

It is an amenable number.

21013221300312 is an abundant number, since it is smaller than the sum of its proper divisors (31519971659688).

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

21013221300312 is a wasteful number, since it uses less digits than its factorization.

21013221300312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328495 (or 2328491 counting only the distinct ones).

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

Adding to 21013221300312 its reverse (21300312231012), we get a palindrome (42313533531324).

The spelling of 21013221300312 in words is "twenty-one trillion, thirteen billion, two hundred twenty-one million, three hundred thousand, three hundred twelve".