20011022212212 has 36 divisors (see below), whose sum is σ = 50584578460416. Its totient is φ = 6670187611920.

The previous prime is 20011022212211. The next prime is 20011022212217. The reversal of 20011022212212 is 21221222011002.

It is a happy number.

20011022212212 is a `hidden beast` number, since 200 + 110 + 222 + 122 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011022212211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4784778 + ... + 7931969.

It is an arithmetic number, because the mean of its divisors is an integer number (1405127179456).

Almost surely, 2^{20011022212212} is an apocalyptic number.

It is an amenable number.

20011022212212 is an abundant number, since it is smaller than the sum of its proper divisors (30573556248204).

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

20011022212212 is a wasteful number, since it uses less digits than its factorization.

20011022212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12760468 (or 12760463 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20011022212212 its reverse (21221222011002), we get a palindrome (41232244223214).

The spelling of 20011022212212 in words is "twenty trillion, eleven billion, twenty-two million, two hundred twelve thousand, two hundred twelve".