21012241045024 has 24 divisors (see below), whose sum is σ = 42148375024140. Its totient is φ = 10307891832576.

The previous prime is 21012241045021. The next prime is 21012241045043. The reversal of 21012241045024 is 42054014221012.

It can be written as a sum of positive squares in 2 ways, for example, as 20940984081424 + 71256963600 = 4576132^2 + 266940^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21012241044983 and 21012241045001.

It is not an unprimeable number, because it can be changed into a prime (21012241045021) 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 3 ways as a sum of consecutive naturals, for example, 6194644839 + ... + 6194648230.

Almost surely, 2^{21012241045024} is an apocalyptic number.

It is an amenable number.

21012241045024 is an abundant number, since it is smaller than the sum of its proper divisors (21136133979116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012241045024 is a wasteful number, since it uses less digits than its factorization.

21012241045024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12389293132 (or 12389293124 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 21012241045024 its reverse (42054014221012), we get a palindrome (63066255266036).

The spelling of 21012241045024 in words is "twenty-one trillion, twelve billion, two hundred forty-one million, forty-five thousand, twenty-four".