12221112012210 has 128 divisors (see below), whose sum is σ = 32893731763200. Its totient is φ = 3228562540800.

The previous prime is 12221112012169. The next prime is 12221112012211. The reversal of 12221112012210 is 1221021112221.

12221112012210 is a `hidden beast` number, since 12 + 221 + 11 + 201 + 221 + 0 = 666.

12221112012210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12221112012211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 213250560 + ... + 213307860.

It is an arithmetic number, because the mean of its divisors is an integer number (256982279400).

Almost surely, 2^{12221112012210} is an apocalyptic number.

12221112012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221112012210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16446865881600).

12221112012210 is an abundant number, since it is smaller than the sum of its proper divisors (20672619750990).

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

12221112012210 is a wasteful number, since it uses less digits than its factorization.

12221112012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64673 (or 64667 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12221112012210 its reverse (1221021112221), we get a palindrome (13442133124431).

The spelling of 12221112012210 in words is "twelve trillion, two hundred twenty-one billion, one hundred twelve million, twelve thousand, two hundred ten".