12221210211210 has 640 divisors, whose sum is σ = 45022291776000. Its totient is φ = 2344120611840.

The previous prime is 12221210211209. The next prime is 12221210211251. The reversal of 12221210211210 is 1211201212221.

12221210211210 is a `hidden beast` number, since 1 + 2 + 221 + 21 + 0 + 211 + 210 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 39575886 + ... + 39883494.

It is an arithmetic number, because the mean of its divisors is an integer number (70347330900).

Almost surely, 2^{12221210211210} is an apocalyptic number.

12221210211210 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 12221210211210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22511145888000).

12221210211210 is an abundant number, since it is smaller than the sum of its proper divisors (32801081564790).

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

12221210211210 is a wasteful number, since it uses less digits than its factorization.

12221210211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307673 (or 307650 counting only the distinct ones).

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

Adding to 12221210211210 its reverse (1211201212221), we get a palindrome (13432411423431).

The spelling of 12221210211210 in words is "twelve trillion, two hundred twenty-one billion, two hundred ten million, two hundred eleven thousand, two hundred ten".