12215882869 has 4 divisors (see below), whose sum is σ = 12257575596. Its totient is φ = 12174190144.

The previous prime is 12215882867. The next prime is 12215882881. The reversal of 12215882869 is 96828851221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96828851221 = 53 ⋅1826959457.

It can be written as a sum of positive squares in 2 ways, for example, as 4971660100 + 7244222769 = 70510^2 + 85113^2 .

It is a cyclic number.

It is not a de Polignac number, because 12215882869 - 2¹ = 12215882867 is a prime.

It is a super-2 number, since 2×12215882869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215882863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20845924 + ... + 20846509.

It is an arithmetic number, because the mean of its divisors is an integer number (3064393899).

Almost surely, 2^12215882869 is an apocalyptic number.

It is an amenable number.

12215882869 is a deficient number, since it is larger than the sum of its proper divisors (41692727).

12215882869 is an equidigital number, since it uses as much as digits as its factorization.

12215882869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41692726.

The product of its digits is 1105920, while the sum is 52.

The spelling of 12215882869 in words is "twelve billion, two hundred fifteen million, eight hundred eighty-two thousand, eight hundred sixty-nine".