20121220212012 has 72 divisors (see below), whose sum is σ = 51084885808320. Its totient is φ = 6677689455360.

The previous prime is 20121220212007. The next prime is 20121220212089. The reversal of 20121220212012 is 21021202212102.

It is a happy number.

20121220212012 is a `hidden beast` number, since 201 + 21 + 220 + 21 + 201 + 2 = 666.

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 23 ways as a sum of consecutive naturals, for example, 43763562 + ... + 44220942.

Almost surely, 2^{20121220212012} is an apocalyptic number.

It is an amenable number.

20121220212012 is an abundant number, since it is smaller than the sum of its proper divisors (30963665596308).

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

20121220212012 is a wasteful number, since it uses less digits than its factorization.

20121220212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462743 (or 462738 counting only the distinct ones).

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

Adding to 20121220212012 its reverse (21021202212102), we get a palindrome (41142422424114).

The spelling of 20121220212012 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, twelve".