12217055530 has 16 divisors (see below), whose sum is σ = 22585043880. Its totient is φ = 4754745792.

The previous prime is 12217055519. The next prime is 12217055531. The reversal of 12217055530 is 3555071221.

It can be written as a sum of positive squares in 4 ways, for example, as 9369659209 + 2847396321 = 96797^2 + 53361^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12217055492 and 12217055501.

It is not an unprimeable number, because it can be changed into a prime (12217055531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16509165 + ... + 16509904.

Almost surely, 2^12217055530 is an apocalyptic number.

12217055530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12217055530 is a deficient number, since it is larger than the sum of its proper divisors (10367988350).

12217055530 is a wasteful number, since it uses less digits than its factorization.

12217055530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33019113.

The product of its (nonzero) digits is 10500, while the sum is 31.

The spelling of 12217055530 in words is "twelve billion, two hundred seventeen million, fifty-five thousand, five hundred thirty".