2001212212222 has 32 divisors (see below), whose sum is σ = 3181693132800. Its totient is φ = 941391914400.

The previous prime is 2001212212187. The next prime is 2001212212273. The reversal of 2001212212222 is 2222122121002.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 2001212212222.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 4742947 + ... + 5147617.

It is an arithmetic number, because the mean of its divisors is an integer number (99427910400).

Almost surely, 2^{2001212212222} is an apocalyptic number.

2001212212222 is a deficient number, since it is larger than the sum of its proper divisors (1180480920578).

2001212212222 is a wasteful number, since it uses less digits than its factorization.

2001212212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405592.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2001212212222 its reverse (2222122121002), we get a palindrome (4223334333224).

The spelling of 2001212212222 in words is "two trillion, one billion, two hundred twelve million, two hundred twelve thousand, two hundred twenty-two".