12200221221018 has 32 divisors (see below), whose sum is σ = 24508764933120. Its totient is φ = 4048687875120.

The previous prime is 12200221221017. The next prime is 12200221221037. The reversal of 12200221221018 is 81012212200221.

It is not an unprimeable number, because it can be changed into a prime (12200221221017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44907273 + ... + 45178131.

It is an arithmetic number, because the mean of its divisors is an integer number (765898904160).

Almost surely, 2^{12200221221018} is an apocalyptic number.

12200221221018 is an abundant number, since it is smaller than the sum of its proper divisors (12308543712102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12200221221018 is a wasteful number, since it uses less digits than its factorization.

12200221221018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304162.

The product of its (nonzero) digits is 512, while the sum is 24.

Adding to 12200221221018 its reverse (81012212200221), we get a palindrome (93212433421239).

The spelling of 12200221221018 in words is "twelve trillion, two hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, eighteen".