21033331312 has 40 divisors (see below), whose sum is σ = 46602223616. Its totient is φ = 9008784576.

The previous prime is 21033331309. The next prime is 21033331339. The reversal of 21033331312 is 21313333012.

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, 129793 + ... + 242719.

Almost surely, 2^21033331312 is an apocalyptic number.

It is an amenable number.

21033331312 is an abundant number, since it is smaller than the sum of its proper divisors (25568892304).

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

21033331312 is a wasteful number, since it uses less digits than its factorization.

21033331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114605 (or 114599 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21033331312 its reverse (21313333012), we get a palindrome (42346664324).

The spelling of 21033331312 in words is "twenty-one billion, thirty-three million, three hundred thirty-one thousand, three hundred twelve".