20012220121212 has 36 divisors (see below), whose sum is σ = 55185213062616. Its totient is φ = 6064309127520.

The previous prime is 20012220121189. The next prime is 20012220121213. The reversal of 20012220121212 is 21212102221002.

It is a happy number.

20012220121212 is a `hidden beast` number, since 200 + 12 + 220 + 1 + 21 + 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012220121213) 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, 25267954303 + ... + 25267955094.

Almost surely, 2^{20012220121212} is an apocalyptic number.

20012220121212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20012220121212 is an abundant number, since it is smaller than the sum of its proper divisors (35172992941404).

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

20012220121212 is a wasteful number, since it uses less digits than its factorization.

20012220121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50535909418 (or 50535909413 counting only the distinct ones).

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

Adding to 20012220121212 its reverse (21212102221002), we get a palindrome (41224322342214).

The spelling of 20012220121212 in words is "twenty trillion, twelve billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twelve".