20021012122212 has 36 divisors (see below), whose sum is σ = 50609052211536. Its totient is φ = 6673620244080.

The previous prime is 20021012122201. The next prime is 20021012122213. The reversal of 20021012122212 is 21222121012002.

It is a happy number.

20021012122212 is a `hidden beast` number, since 20 + 0 + 210 + 1 + 212 + 221 + 2 = 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 not an unprimeable number, because it can be changed into a prime (20021012122213) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2886583 + ... + 6955169.

It is an arithmetic number, because the mean of its divisors is an integer number (1405807005876).

Almost surely, 2^{20021012122212} is an apocalyptic number.

It is an amenable number.

20021012122212 is an abundant number, since it is smaller than the sum of its proper divisors (30588040089324).

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

20021012122212 is a wasteful number, since it uses less digits than its factorization.

20021012122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4205288 (or 4205283 counting only the distinct ones).

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

Adding to 20021012122212 its reverse (21222121012002), we get a palindrome (41243133134214).

The spelling of 20021012122212 in words is "twenty trillion, twenty-one billion, twelve million, one hundred twenty-two thousand, two hundred twelve".