21022121332312 has 16 divisors (see below), whose sum is σ = 39416526342360. Its totient is φ = 10511047641024.

The previous prime is 21022121332297. The next prime is 21022121332349. The reversal of 21022121332312 is 21323312122012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10919703 + ... + 12699769.

Almost surely, 2^{21022121332312} is an apocalyptic number.

It is an amenable number.

21022121332312 is a deficient number, since it is larger than the sum of its proper divisors (18394405010048).

21022121332312 is a wasteful number, since it uses less digits than its factorization.

21022121332312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256290 (or 3256286 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21022121332312 its reverse (21323312122012), we get a palindrome (42345433454324).

The spelling of 21022121332312 in words is "twenty-one trillion, twenty-two billion, one hundred twenty-one million, three hundred thirty-two thousand, three hundred twelve".