20110120220 has 48 divisors (see below), whose sum is σ = 44508656640. Its totient is φ = 7611299136.

The previous prime is 20110120189. The next prime is 20110120241. The reversal of 20110120220 is 2202101102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280589 + ... + 344891.

It is an arithmetic number, because the mean of its divisors is an integer number (927263680).

Almost surely, 2^20110120220 is an apocalyptic number.

20110120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22254328320).

20110120220 is an abundant number, since it is smaller than the sum of its proper divisors (24398536420).

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

20110120220 is a wasteful number, since it uses less digits than its factorization.

20110120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65154 (or 65152 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20110120220 its reverse (2202101102), we get a palindrome (22312221322).

The spelling of 20110120220 in words is "twenty billion, one hundred ten million, one hundred twenty thousand, two hundred twenty".