21033313332312 has 32 divisors (see below), whose sum is σ = 53368108459200. Its totient is φ = 6906461093664.

The previous prime is 21033313332307. The next prime is 21033313332331. The reversal of 21033313332312 is 21323331333012.

It is a self number, because there is not a number n which added to its sum of digits gives 21033313332312.

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, 6540207762 + ... + 6540210977.

It is an arithmetic number, because the mean of its divisors is an integer number (1667753389350).

Almost surely, 2^{21033313332312} is an apocalyptic number.

It is an amenable number.

21033313332312 is an abundant number, since it is smaller than the sum of its proper divisors (32334795126888).

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

21033313332312 is a wasteful number, since it uses less digits than its factorization.

21033313332312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13080418815 (or 13080418811 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 30.

Adding to 21033313332312 its reverse (21323331333012), we get a palindrome (42356644665324).

The spelling of 21033313332312 in words is "twenty-one trillion, thirty-three billion, three hundred thirteen million, three hundred thirty-two thousand, three hundred twelve".