12205001 has 2 divisors, whose sum is σ = 12205002. Its totient is φ = 12205000.

The previous prime is 12204989. The next prime is 12205009. The reversal of 12205001 is 10050221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11526025 + 678976 = 3395^2 + 824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12205001 is a prime.

It is a super-3 number, since 3×12205001³ (a number of 22 digits) contains 333 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (12205009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6102500 + 6102501.

It is an arithmetic number, because the mean of its divisors is an integer number (6102501).

Almost surely, 2^12205001 is an apocalyptic number.

It is an amenable number.

12205001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12205001 is an equidigital number, since it uses as much as digits as its factorization.

12205001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 12205001 is about 3493.5656570329. The cubic root of 12205001 is about 230.2392029355.

Adding to 12205001 its reverse (10050221), we get a palindrome (22255222).

The spelling of 12205001 in words is "twelve million, two hundred five thousand, one".