366216612121 has 2 divisors, whose sum is σ = 366216612122. Its totient is φ = 366216612120.

The previous prime is 366216612011. The next prime is 366216612199. The reversal of 366216612121 is 121216612663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320849742096 + 45366870025 = 566436^2 + 212995^2 .

It is an emirp because it is prime and its reverse (121216612663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 366216612121 - 2¹⁷ = 366216481049 is a prime.

It is a super-2 number, since 2×366216612121² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (366216612521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 183108306060 + 183108306061.

It is an arithmetic number, because the mean of its divisors is an integer number (183108306061).

Almost surely, 2^366216612121 is an apocalyptic number.

It is an amenable number.

366216612121 is a deficient number, since it is larger than the sum of its proper divisors (1).

366216612121 is an equidigital number, since it uses as much as digits as its factorization.

366216612121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The spelling of 366216612121 in words is "three hundred sixty-six billion, two hundred sixteen million, six hundred twelve thousand, one hundred twenty-one".