20112221212012 has 12 divisors (see below), whose sum is σ = 35232634694376. Its totient is φ = 10045754156480.

The previous prime is 20112221212009. The next prime is 20112221212043. The reversal of 20112221212012 is 21021212221102.

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 3 ways as a sum of consecutive naturals, for example, 2589108013 + ... + 2589115780.

It is an arithmetic number, because the mean of its divisors is an integer number (2936052891198).

Almost surely, 2^{20112221212012} is an apocalyptic number.

It is an amenable number.

20112221212012 is a deficient number, since it is larger than the sum of its proper divisors (15120413482364).

20112221212012 is a wasteful number, since it uses less digits than its factorization.

20112221212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178224768 (or 5178224766 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20112221212012 its reverse (21021212221102), we get a palindrome (41133433433114).

The spelling of 20112221212012 in words is "twenty trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, twelve".