20012221212112 has 20 divisors (see below), whose sum is σ = 38775670557376. Its totient is φ = 10005596552160.

The previous prime is 20012221212083. The next prime is 20012221212157. The reversal of 20012221212112 is 21121212221002.

It is a self number, because there is not a number n which added to its sum of digits gives 20012221212112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31807098 + ... + 32430169.

Almost surely, 2^{20012221212112} is an apocalyptic number.

It is an amenable number.

20012221212112 is a deficient number, since it is larger than the sum of its proper divisors (18763449345264).

20012221212112 is a wasteful number, since it uses less digits than its factorization.

20012221212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64256746 (or 64256740 counting only the distinct ones).

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

Adding to 20012221212112 its reverse (21121212221002), we get a palindrome (41133433433114).

The spelling of 20012221212112 in words is "twenty trillion, twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twelve".