12215966069 has 2 divisors, whose sum is σ = 12215966070. Its totient is φ = 12215966068.

The previous prime is 12215966053. The next prime is 12215966083. The reversal of 12215966069 is 96066951221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10546263025 + 1669703044 = 102695^2 + 40862^2 .

It is a cyclic number.

It is not a de Polignac number, because 12215966069 - 2⁴ = 12215966053 is a prime.

It is a super-2 number, since 2×12215966069² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12215966099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107983034 + 6107983035.

It is an arithmetic number, because the mean of its divisors is an integer number (6107983035).

Almost surely, 2^12215966069 is an apocalyptic number.

It is an amenable number.

12215966069 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215966069 is an equidigital number, since it uses as much as digits as its factorization.

12215966069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 12215966069 in words is "twelve billion, two hundred fifteen million, nine hundred sixty-six thousand, sixty-nine".