12203561 has 2 divisors, whose sum is σ = 12203562. Its totient is φ = 12203560.

The previous prime is 12203507. The next prime is 12203617. The reversal of 12203561 is 16530221.

12203561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9859600 + 2343961 = 3140^2 + 1531^2 .

It is an emirp because it is prime and its reverse (16530221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12203561 is a prime.

It is not a weakly prime, because it can be changed into another prime (12205561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6101780 + 6101781.

It is an arithmetic number, because the mean of its divisors is an integer number (6101781).

Almost surely, 2^12203561 is an apocalyptic number.

It is an amenable number.

12203561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12203561 is an equidigital number, since it uses as much as digits as its factorization.

12203561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 12203561 is about 3493.3595577896. The cubic root of 12203561 is about 230.2301476995.

Adding to 12203561 its reverse (16530221), we get a palindrome (28733782).

The spelling of 12203561 in words is "twelve million, two hundred three thousand, five hundred sixty-one".