12001300312221 has 18 divisors (see below), whose sum is σ = 19054406098910. Its totient is φ = 7273515340080.

The previous prime is 12001300312193. The next prime is 12001300312387. The reversal of 12001300312221 is 12221300310021.

12001300312221 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 130 + 0 + 312 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11999365280100 + 1935032121 = 3464010^2 + 43989^2 .

It is not a de Polignac number, because 12001300312221 - 2³⁸ = 11726422405277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001300312194 and 12001300312203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001300312721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5510237806 + ... + 5510239983.

Almost surely, 2^{12001300312221} is an apocalyptic number.

12001300312221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001300312221 is a deficient number, since it is larger than the sum of its proper divisors (7053105786689).

12001300312221 is a wasteful number, since it uses less digits than its factorization.

12001300312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020477817 (or 11020477803 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12001300312221 its reverse (12221300310021), we get a palindrome (24222600622242).

The spelling of 12001300312221 in words is "twelve trillion, one billion, three hundred million, three hundred twelve thousand, two hundred twenty-one".