20120021122212 has 36 divisors (see below), whose sum is σ = 55482482489616. Its totient is φ = 6096976097520.

The previous prime is 20120021122129. The next prime is 20120021122247. The reversal of 20120021122212 is 21222112002102.

It is a happy number.

20120021122212 is a `hidden beast` number, since 20 + 1 + 200 + 211 + 22 + 212 = 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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25404066678 + ... + 25404067469.

It is an arithmetic number, because the mean of its divisors is an integer number (1541180069156).

Almost surely, 2^{20120021122212} is an apocalyptic number.

20120021122212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20120021122212 is an abundant number, since it is smaller than the sum of its proper divisors (35362461367404).

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

20120021122212 is a wasteful number, since it uses less digits than its factorization.

20120021122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50808134168 (or 50808134163 counting only the distinct ones).

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

Adding to 20120021122212 its reverse (21222112002102), we get a palindrome (41342133124314).

The spelling of 20120021122212 in words is "twenty trillion, one hundred twenty billion, twenty-one million, one hundred twenty-two thousand, two hundred twelve".