20111202210220 has 48 divisors (see below), whose sum is σ = 46073247897600. Its totient is φ = 7313114928320.

The previous prime is 20111202210191. The next prime is 20111202210251. The reversal of 20111202210220 is 2201220211102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20111202210194 and 20111202210203.

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, 53390901 + ... + 53766259.

It is an arithmetic number, because the mean of its divisors is an integer number (959859331200).

Almost surely, 2^{20111202210220} is an apocalyptic number.

20111202210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111202210220 is an abundant number, since it is smaller than the sum of its proper divisors (25962045687380).

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

20111202210220 is a wasteful number, since it uses less digits than its factorization.

20111202210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618918 (or 618916 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20111202210220 its reverse (2201220211102), we get a palindrome (22312422421322).

The spelling of 20111202210220 in words is "twenty trillion, one hundred eleven billion, two hundred two million, two hundred ten thousand, two hundred twenty".