12215420343 has 12 divisors (see below), whose sum is σ = 20165138448. Its totient is φ = 6980240160.

The previous prime is 12215420317. The next prime is 12215420353. The reversal of 12215420343 is 34302451221.

It is not a de Polignac number, because 12215420343 - 2⁶ = 12215420279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215420303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96947718 + ... + 96947843.

It is an arithmetic number, because the mean of its divisors is an integer number (1680428204).

Almost surely, 2^12215420343 is an apocalyptic number.

12215420343 is a deficient number, since it is larger than the sum of its proper divisors (7949718105).

12215420343 is a wasteful number, since it uses less digits than its factorization.

12215420343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193895574 (or 193895571 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 12215420343 its reverse (34302451221), we get a palindrome (46517871564).

The spelling of 12215420343 in words is "twelve billion, two hundred fifteen million, four hundred twenty thousand, three hundred forty-three".