21022023031312 has 10 divisors (see below), whose sum is σ = 40730169623198. Its totient is φ = 10511011515648.

The previous prime is 21022023031297. The next prime is 21022023031351. The reversal of 21022023031312 is 21313032022012.

It can be written as a sum of positive squares in only one way, i.e., 17585240962576 + 3436782068736 = 4193476^2 + 1853856^2 .

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 as a sum of consecutive naturals, namely, 656938219713 + ... + 656938219744.

Almost surely, 2^{21022023031312} is an apocalyptic number.

It is an amenable number.

21022023031312 is a deficient number, since it is larger than the sum of its proper divisors (19708146591886).

21022023031312 is a wasteful number, since it uses less digits than its factorization.

21022023031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313876439465 (or 1313876439459 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21022023031312 its reverse (21313032022012), we get a palindrome (42335055053324).

The spelling of 21022023031312 in words is "twenty-one trillion, twenty-two billion, twenty-three million, thirty-one thousand, three hundred twelve".