21303001221312 has 28 divisors (see below), whose sum is σ = 56364190731896. Its totient is φ = 7101000407040.

The previous prime is 21303001221277. The next prime is 21303001221329. The reversal of 21303001221312 is 21312210030312.

It is a super-2 number, since 2×21303001221312² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55476565489 + ... + 55476565872.

Almost surely, 2^{21303001221312} is an apocalyptic number.

It is an amenable number.

21303001221312 is an abundant number, since it is smaller than the sum of its proper divisors (35061189510584).

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

21303001221312 is a wasteful number, since it uses less digits than its factorization.

21303001221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110953131376 (or 110953131366 counting only the distinct ones).

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

Adding to 21303001221312 its reverse (21312210030312), we get a palindrome (42615211251624).

The spelling of 21303001221312 in words is "twenty-one trillion, three hundred three billion, one million, two hundred twenty-one thousand, three hundred twelve".