20120122212012 has 96 divisors (see below), whose sum is σ = 53904859599360. Its totient is φ = 6485878526400.

The previous prime is 20120122211993. The next prime is 20120122212067. The reversal of 20120122212012 is 21021222102102.

It is a happy number.

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

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 31 ways as a sum of consecutive naturals, for example, 20978968 + ... + 21917055.

It is an arithmetic number, because the mean of its divisors is an integer number (561508954160).

Almost surely, 2^{20120122212012} is an apocalyptic number.

It is an amenable number.

20120122212012 is an abundant number, since it is smaller than the sum of its proper divisors (33784737387348).

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

20120122212012 is a wasteful number, since it uses less digits than its factorization.

20120122212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42896180 (or 42896172 counting only the distinct ones).

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

Adding to 20120122212012 its reverse (21021222102102), we get a palindrome (41141344314114).

The spelling of 20120122212012 in words is "twenty trillion, one hundred twenty billion, one hundred twenty-two million, two hundred twelve thousand, twelve".