20101111110220 has 48 divisors (see below), whose sum is σ = 48243792905280. Its totient is φ = 6891648632064.

The previous prime is 20101111110187. The next prime is 20101111110233. The reversal of 20101111110220 is 2201111110102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20101111110220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4421326 + ... + 7729834.

It is an arithmetic number, because the mean of its divisors is an integer number (1005079018860).

Almost surely, 2^{20101111110220} is an apocalyptic number.

20101111110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101111110220 is an abundant number, since it is smaller than the sum of its proper divisors (28142681795060).

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

20101111110220 is a wasteful number, since it uses less digits than its factorization.

20101111110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351922 (or 3351920 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20101111110220 its reverse (2201111110102), we get a palindrome (22302222220322).

The spelling of 20101111110220 in words is "twenty trillion, one hundred one billion, one hundred eleven million, one hundred ten thousand, two hundred twenty".