12224500542221 has 16 divisors (see below), whose sum is σ = 13446636609408. Its totient is φ = 11112682727520.

The previous prime is 12224500542217. The next prime is 12224500542259.

12224500542221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12224500542221 - 2² = 12224500542217 is a prime.

It is a super-2 number, since 2×12224500542221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224580542221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31207640 + ... + 31596926.

It is an arithmetic number, because the mean of its divisors is an integer number (840414788088).

Almost surely, 2^{12224500542221} is an apocalyptic number.

12224500542221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12224500542221 is a deficient number, since it is larger than the sum of its proper divisors (1222136067187).

12224500542221 is an equidigital number, since it uses as much as digits as its factorization.

12224500542221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412913 (or 412891 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

It can be divided in two parts, 12224500 and 542221, that added together give a palindrome (12766721).

The spelling of 12224500542221 in words is "twelve trillion, two hundred twenty-four billion, five hundred million, five hundred forty-two thousand, two hundred twenty-one".