20011221110212 has 12 divisors (see below), whose sum is σ = 35028572830720. Its totient is φ = 10003057444296.

The previous prime is 20011221110143. The next prime is 20011221110249. The reversal of 20011221110212 is 21201112211002.

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, 638260068 + ... + 638291419.

Almost surely, 2^{20011221110212} is an apocalyptic number.

It is an amenable number.

20011221110212 is a deficient number, since it is larger than the sum of its proper divisors (15017351720508).

20011221110212 is a wasteful number, since it uses less digits than its factorization.

20011221110212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276555410 (or 1276555408 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20011221110212 its reverse (21201112211002), we get a palindrome (41212333321214).

The spelling of 20011221110212 in words is "twenty trillion, eleven billion, two hundred twenty-one million, one hundred ten thousand, two hundred twelve".