2201211211212 has 480 divisors, whose sum is σ = 6480723332160. Its totient is φ = 647189637120.

The previous prime is 2201211211211. The next prime is 2201211211219. The reversal of 2201211211212 is 2121121121022.

2201211211212 is a `hidden beast` number, since 220 + 1 + 21 + 1 + 211 + 212 = 666.

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 (2201211211211) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1484295423 + ... + 1484296905.

It is an arithmetic number, because the mean of its divisors is an integer number (13501506942).

Almost surely, 2^{2201211211212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2201211211212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3240361666080).

2201211211212 is an abundant number, since it is smaller than the sum of its proper divisors (4279512120948).

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

2201211211212 is a wasteful number, since it uses less digits than its factorization.

2201211211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735 (or 1724 counting only the distinct ones).

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

Adding to 2201211211212 its reverse (2121121121022), we get a palindrome (4322332332234).

The spelling of 2201211211212 in words is "two trillion, two hundred one billion, two hundred eleven million, two hundred eleven thousand, two hundred twelve".