21244232344025 has 12 divisors (see below), whose sum is σ = 26703709041852. Its totient is φ = 16762572368640.

The previous prime is 21244232344001. The next prime is 21244232344039. The reversal of 21244232344025 is 52044323244212.

It can be written as a sum of positive squares in 6 ways, for example, as 819942927049 + 20424289416976 = 905507^2 + 4519324^2 .

It is not a de Polignac number, because 21244232344025 - 2¹⁸ = 21244232081881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21244232344025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5820335804 + ... + 5820339453.

It is an arithmetic number, because the mean of its divisors is an integer number (2225309086821).

Almost surely, 2^{21244232344025} is an apocalyptic number.

21244232344025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21244232344025 is a deficient number, since it is larger than the sum of its proper divisors (5459476697827).

21244232344025 is a wasteful number, since it uses less digits than its factorization.

21244232344025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11640675340 (or 11640675335 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 38.

Adding to 21244232344025 its reverse (52044323244212), we get a palindrome (73288555588237).

The spelling of 21244232344025 in words is "twenty-one trillion, two hundred forty-four billion, two hundred thirty-two million, three hundred forty-four thousand, twenty-five".