20120122220 has 48 divisors (see below), whose sum is σ = 46225620000. Its totient is φ = 7295416320.

The previous prime is 20120122207. The next prime is 20120122223. The reversal of 20120122220 is 2222102102.

It is a junction number, because it is equal to n+sod(n) for n = 20120122195 and 20120122204.

It is not an unprimeable number, because it can be changed into a prime (20120122223) 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 15 ways as a sum of consecutive naturals, for example, 54245 + ... + 207804.

It is an arithmetic number, because the mean of its divisors is an integer number (963033750).

Almost surely, 2^20120122220 is an apocalyptic number.

20120122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120122220 is an abundant number, since it is smaller than the sum of its proper divisors (26105497780).

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

20120122220 is a wasteful number, since it uses less digits than its factorization.

20120122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262418 (or 262416 counting only the distinct ones).

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

Adding to 20120122220 its reverse (2222102102), we get a palindrome (22342224322).

The spelling of 20120122220 in words is "twenty billion, one hundred twenty million, one hundred twenty-two thousand, two hundred twenty".