12200000121521 has 2 divisors, whose sum is σ = 12200000121522. Its totient is φ = 12200000121520.

The previous prime is 12200000121509. The next prime is 12200000121563. The reversal of 12200000121521 is 12512100000221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11718051770896 + 481948350625 = 3423164^2 + 694225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12200000121521 is a prime.

It is a super-2 number, since 2×12200000121521² (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 12200000121521.

It is not a weakly prime, because it can be changed into another prime (12200000121571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6100000060760 + 6100000060761.

It is an arithmetic number, because the mean of its divisors is an integer number (6100000060761).

Almost surely, 2^{12200000121521} is an apocalyptic number.

It is an amenable number.

12200000121521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12200000121521 is an equidigital number, since it uses as much as digits as its factorization.

12200000121521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 12200000121521 its reverse (12512100000221), we get a palindrome (24712100121742).

The spelling of 12200000121521 in words is "twelve trillion, two hundred billion, one hundred twenty-one thousand, five hundred twenty-one".