21550411112325 has 96 divisors (see below), whose sum is σ = 36791885168640. Its totient is φ = 11126510438400.

The previous prime is 21550411112299. The next prime is 21550411112381. The reversal of 21550411112325 is 52321111405512.

It is not a de Polignac number, because 21550411112325 - 2⁹ = 21550411111813 is a prime.

It is a super-2 number, since 2×21550411112325² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 65434416 + ... + 65762934.

It is an arithmetic number, because the mean of its divisors is an integer number (383248803840).

Almost surely, 2^{21550411112325} is an apocalyptic number.

21550411112325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21550411112325 is a deficient number, since it is larger than the sum of its proper divisors (15241474056315).

21550411112325 is a wasteful number, since it uses less digits than its factorization.

21550411112325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328827 (or 328822 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 33.

Adding to 21550411112325 its reverse (52321111405512), we get a palindrome (73871522517837).

The spelling of 21550411112325 in words is "twenty-one trillion, five hundred fifty billion, four hundred eleven million, one hundred twelve thousand, three hundred twenty-five".