21320010123112 has 32 divisors (see below), whose sum is σ = 42366085446600. Its totient is φ = 10023560515584.

The previous prime is 21320010123109. The next prime is 21320010123121. The reversal of 21320010123112 is 21132101002312.

It can be written as a sum of positive squares in 4 ways, for example, as 18407137445316 + 2912872677796 = 4290354^2 + 1706714^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21320010123112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73177713 + ... + 73468480.

Almost surely, 2^{21320010123112} is an apocalyptic number.

It is an amenable number.

21320010123112 is a deficient number, since it is larger than the sum of its proper divisors (21046075323488).

21320010123112 is a wasteful number, since it uses less digits than its factorization.

21320010123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146647285 (or 146647281 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21320010123112 its reverse (21132101002312), we get a palindrome (42452111125424).

The spelling of 21320010123112 in words is "twenty-one trillion, three hundred twenty billion, ten million, one hundred twenty-three thousand, one hundred twelve".