21312033330331 has 8 divisors (see below), whose sum is σ = 22241716557984. Its totient is φ = 20382606192960.

The previous prime is 21312033330323. The next prime is 21312033330347. The reversal of 21312033330331 is 13303333021312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21312033330331 - 2³ = 21312033330323 is a prime.

It is a super-2 number, since 2×21312033330331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21312033330331.

It is not an unprimeable number, because it can be changed into a prime (21312033330031) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 63852490 + ... + 64185391.

It is an arithmetic number, because the mean of its divisors is an integer number (2780214569748).

Almost surely, 2^{21312033330331} is an apocalyptic number.

21312033330331 is a deficient number, since it is larger than the sum of its proper divisors (929683227653).

21312033330331 is a wasteful number, since it uses less digits than its factorization.

21312033330331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128045141.

The product of its (nonzero) digits is 8748, while the sum is 28.

Adding to 21312033330331 its reverse (13303333021312), we get a palindrome (34615366351643).

The spelling of 21312033330331 in words is "twenty-one trillion, three hundred twelve billion, thirty-three million, three hundred thirty thousand, three hundred thirty-one".