21321033321112 has 32 divisors (see below), whose sum is σ = 47674360224000. Its totient is φ = 8740299373344.

The previous prime is 21321033321097. The next prime is 21321033321121. The reversal of 21321033321112 is 21112333012312.

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, 8276797362 + ... + 8276799937.

It is an arithmetic number, because the mean of its divisors is an integer number (1489823757000).

Almost surely, 2^{21321033321112} is an apocalyptic number.

It is an amenable number.

21321033321112 is an abundant number, since it is smaller than the sum of its proper divisors (26353326902888).

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

21321033321112 is a wasteful number, since it uses less digits than its factorization.

21321033321112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16553597335 (or 16553597331 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21321033321112 its reverse (21112333012312), we get a palindrome (42433366333424).

The spelling of 21321033321112 in words is "twenty-one trillion, three hundred twenty-one billion, thirty-three million, three hundred twenty-one thousand, one hundred twelve".