2201221221212 has 24 divisors (see below), whose sum is σ = 4148547472272. Its totient is φ = 1015925702400.

The previous prime is 2201221221211. The next prime is 2201221221259. The reversal of 2201221221212 is 2121221221022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201221221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2020787 + ... + 2913077.

It is an arithmetic number, because the mean of its divisors is an integer number (172856144678).

Almost surely, 2^{2201221221212} is an apocalyptic number.

It is an amenable number.

2201221221212 is a deficient number, since it is larger than the sum of its proper divisors (1947326251060).

2201221221212 is a wasteful number, since it uses less digits than its factorization.

2201221221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939749 (or 939747 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2201221221212 its reverse (2121221221022), we get a palindrome (4322442442234).

The spelling of 2201221221212 in words is "two trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".