21123110333330 has 16 divisors (see below), whose sum is σ = 38021688797400. Its totient is φ = 8449224089472.

The previous prime is 21123110333323. The next prime is 21123110333357. The reversal of 21123110333330 is 3333301132112.

21123110333330 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17007945116761 + 4115165216569 = 4124069^2 + 2028587^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21123110333330.

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, 2372996 + ... + 6919344.

Almost surely, 2^{21123110333330} is an apocalyptic number.

21123110333330 is a deficient number, since it is larger than the sum of its proper divisors (16898578464070).

21123110333330 is a wasteful number, since it uses less digits than its factorization.

21123110333330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5010973.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21123110333330 its reverse (3333301132112), we get a palindrome (24456411465442).

The spelling of 21123110333330 in words is "twenty-one trillion, one hundred twenty-three billion, one hundred ten million, three hundred thirty-three thousand, three hundred thirty".