21000303103312 has 40 divisors (see below), whose sum is σ = 43818520358816. Its totient is φ = 9692319240576.

The previous prime is 21000303103271. The next prime is 21000303103333. The reversal of 21000303103312 is 21330130300012.

It is a self number, because there is not a number n which added to its sum of digits gives 21000303103312.

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, 16083883 + ... + 17340469.

Almost surely, 2^{21000303103312} is an apocalyptic number.

It is an amenable number.

21000303103312 is an abundant number, since it is smaller than the sum of its proper divisors (22818217255504).

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

21000303103312 is a wasteful number, since it uses less digits than its factorization.

21000303103312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336955 (or 1336949 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21000303103312 its reverse (21330130300012), we get a palindrome (42330433403324).

The spelling of 21000303103312 in words is "twenty-one trillion, three hundred three million, one hundred three thousand, three hundred twelve".