21043025245011 has 64 divisors (see below), whose sum is σ = 36236427494400. Its totient is φ = 10544991283200.

The previous prime is 21043025244971. The next prime is 21043025245027. The reversal of 21043025245011 is 11054252034012.

It is not a de Polignac number, because 21043025245011 - 2¹⁰ = 21043025243987 is a prime.

It is a super-2 number, since 2×21043025245011² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21043025245011.

It is not an unprimeable number, because it can be changed into a prime (21043025245051) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 11639316 + ... + 13325153.

It is an arithmetic number, because the mean of its divisors is an integer number (566194179600).

Almost surely, 2^{21043025245011} is an apocalyptic number.

21043025245011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21043025245011 is a deficient number, since it is larger than the sum of its proper divisors (15193402249389).

21043025245011 is a wasteful number, since it uses less digits than its factorization.

21043025245011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24964620.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 21043025245011 its reverse (11054252034012), we get a palindrome (32097277279023).

The spelling of 21043025245011 in words is "twenty-one trillion, forty-three billion, twenty-five million, two hundred forty-five thousand, eleven".