20011212112212 has 48 divisors (see below), whose sum is σ = 52415775166720. Its totient is φ = 6601636982016.

The previous prime is 20011212112193. The next prime is 20011212112273. The reversal of 20011212112212 is 21221121211002.

20011212112212 is a `hidden beast` number, since 200 + 11 + 21 + 211 + 221 + 2 = 666.

It is a super-2 number, since 2×20011212112212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 955087468 + ... + 955108419.

Almost surely, 2^{20011212112212} is an apocalyptic number.

It is an amenable number.

20011212112212 is an abundant number, since it is smaller than the sum of its proper divisors (32404563054508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20011212112212 is a wasteful number, since it uses less digits than its factorization.

20011212112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910195997 (or 1910195989 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20011212112212 its reverse (21221121211002), we get a palindrome (41232333323214).

The spelling of 20011212112212 in words is "twenty trillion, eleven billion, two hundred twelve million, one hundred twelve thousand, two hundred twelve".