2001222122012 has 12 divisors (see below), whose sum is σ = 3502215997056. Its totient is φ = 1000588980000.

The previous prime is 2001222121999. The next prime is 2001222122057. The reversal of 2001222122012 is 2102212221002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5315489 + ... + 5679512.

It is an arithmetic number, because the mean of its divisors is an integer number (291851333088).

Almost surely, 2^{2001222122012} is an apocalyptic number.

It is an amenable number.

2001222122012 is a deficient number, since it is larger than the sum of its proper divisors (1500993875044).

2001222122012 is a wasteful number, since it uses less digits than its factorization.

2001222122012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11040508 (or 11040506 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2001222122012 its reverse (2102212221002), we get a palindrome (4103434343014).

The spelling of 2001222122012 in words is "two trillion, one billion, two hundred twenty-two million, one hundred twenty-two thousand, twelve".