20012212221212 has 12 divisors (see below), whose sum is σ = 35021437855656. Its totient is φ = 10006087119600.

The previous prime is 20012212221191. The next prime is 20012212221251. The reversal of 20012212221212 is 21212221221002.

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 3 ways as a sum of consecutive naturals, for example, 2228198 + ... + 6707405.

It is an arithmetic number, because the mean of its divisors is an integer number (2918453154638).

Almost surely, 2^{20012212221212} is an apocalyptic number.

It is an amenable number.

20012212221212 is a deficient number, since it is larger than the sum of its proper divisors (15009225634444).

20012212221212 is a wasteful number, since it uses less digits than its factorization.

20012212221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9495508 (or 9495506 counting only the distinct ones).

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

Adding to 20012212221212 its reverse (21212221221002), we get a palindrome (41224433442214).

The spelling of 20012212221212 in words is "twenty trillion, twelve billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".