21250442552312 has 64 divisors (see below), whose sum is σ = 39972825388800. Its totient is φ = 10591103508480.

The previous prime is 21250442552299. The next prime is 21250442552323. The reversal of 21250442552312 is 21325524405212.

It is a super-2 number, since 2×21250442552312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11656851833 + ... + 11656853655.

It is an arithmetic number, because the mean of its divisors is an integer number (624575396700).

Almost surely, 2^{21250442552312} is an apocalyptic number.

It is an amenable number.

21250442552312 is a deficient number, since it is larger than the sum of its proper divisors (18722382836488).

21250442552312 is a wasteful number, since it uses less digits than its factorization.

21250442552312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256 (or 5252 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 38.

Adding to 21250442552312 its reverse (21325524405212), we get a palindrome (42575966957524).

The spelling of 21250442552312 in words is "twenty-one trillion, two hundred fifty billion, four hundred forty-two million, five hundred fifty-two thousand, three hundred twelve".