12221012211012 has 144 divisors (see below), whose sum is σ = 35689435209792. Its totient is φ = 3484839843840.

The previous prime is 12221012210999. The next prime is 12221012211041. The reversal of 12221012211012 is 21011221012221.

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 47 ways as a sum of consecutive naturals, for example, 36299683 + ... + 36634805.

It is an arithmetic number, because the mean of its divisors is an integer number (247843300068).

Almost surely, 2^{12221012211012} is an apocalyptic number.

12221012211012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221012211012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17844717604896).

12221012211012 is an abundant number, since it is smaller than the sum of its proper divisors (23468422998780).

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

12221012211012 is a wasteful number, since it uses less digits than its factorization.

12221012211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340578 (or 340573 counting only the distinct ones).

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

Adding to 12221012211012 its reverse (21011221012221), we get a palindrome (33232233223233).

The spelling of 12221012211012 in words is "twelve trillion, two hundred twenty-one billion, twelve million, two hundred eleven thousand, twelve".