20120212220 has 24 divisors (see below), whose sum is σ = 42255855600. Its totient is φ = 8047435392.

The previous prime is 20120212219. The next prime is 20120212243. The reversal of 20120212220 is 2221202102.

It is a junction number, because it is equal to n+sod(n) for n = 20120212195 and 20120212204.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 272216 + ... + 338144.

It is an arithmetic number, because the mean of its divisors is an integer number (1760660650).

Almost surely, 2^20120212220 is an apocalyptic number.

20120212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120212220 is an abundant number, since it is smaller than the sum of its proper divisors (22135643380).

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

20120212220 is a wasteful number, since it uses less digits than its factorization.

20120212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81197 (or 81195 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20120212220 its reverse (2221202102), we get a palindrome (22341414322).

The spelling of 20120212220 in words is "twenty billion, one hundred twenty million, two hundred twelve thousand, two hundred twenty".