21300001012 has 24 divisors (see below), whose sum is σ = 39515825160. Its totient is φ = 10011294720.

The previous prime is 21300001007. The next prime is 21300001031. The reversal of 21300001012 is 21010000312.

It can be written as a sum of positive squares in 4 ways, for example, as 2312263396 + 18987737616 = 48086^2 + 137796^2 .

It is a super-2 number, since 2×21300001012² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21300001012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134937 + ... + 246592.

It is an arithmetic number, because the mean of its divisors is an integer number (1646492715).

Almost surely, 2^21300001012 is an apocalyptic number.

It is an amenable number.

21300001012 is a deficient number, since it is larger than the sum of its proper divisors (18215824148).

21300001012 is a wasteful number, since it uses less digits than its factorization.

21300001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382371 (or 382369 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21300001012 its reverse (21010000312), we get a palindrome (42310001324).

The spelling of 21300001012 in words is "twenty-one billion, three hundred million, one thousand, twelve".