12221403215 has 16 divisors (see below), whose sum is σ = 17213777472. Its totient is φ = 8153892864.

The previous prime is 12221403199. The next prime is 12221403263. The reversal of 12221403215 is 51230412221.

It is a cyclic number.

It is not a de Polignac number, because 12221403215 - 2⁴ = 12221403199 is a prime.

It is a super-2 number, since 2×12221403215² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4717394 + ... + 4719983.

It is an arithmetic number, because the mean of its divisors is an integer number (1075861092).

Almost surely, 2^12221403215 is an apocalyptic number.

12221403215 is a deficient number, since it is larger than the sum of its proper divisors (4992374257).

12221403215 is an equidigital number, since it uses as much as digits as its factorization.

12221403215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9437426.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12221403215 its reverse (51230412221), we get a palindrome (63451815436).

The spelling of 12221403215 in words is "twelve billion, two hundred twenty-one million, four hundred three thousand, two hundred fifteen".