12215281829 has 2 divisors, whose sum is σ = 12215281830. Its totient is φ = 12215281828.

The previous prime is 12215281783. The next prime is 12215281843. The reversal of 12215281829 is 92818251221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11385957025 + 829324804 = 106705^2 + 28798^2 .

It is a cyclic number.

It is not a de Polignac number, because 12215281829 - 2²⁴ = 12198504613 is a prime.

It is a super-2 number, since 2×12215281829² (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 (12215221829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107640914 + 6107640915.

It is an arithmetic number, because the mean of its divisors is an integer number (6107640915).

Almost surely, 2^12215281829 is an apocalyptic number.

It is an amenable number.

12215281829 is a deficient number, since it is larger than the sum of its proper divisors (1).

12215281829 is an equidigital number, since it uses as much as digits as its factorization.

12215281829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 41.

The spelling of 12215281829 in words is "twelve billion, two hundred fifteen million, two hundred eighty-one thousand, eight hundred twenty-nine".