20111111202220 has 24 divisors (see below), whose sum is σ = 43689655371600. Its totient is φ = 7767049843392.

The previous prime is 20111111202209. The next prime is 20111111202251. The reversal of 20111111202220 is 2220211111102.

It is a junction number, because it is equal to n+sod(n) for n = 20111111202194 and 20111111202203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17337164250 + ... + 17337165409.

It is an arithmetic number, because the mean of its divisors is an integer number (1820402307150).

Almost surely, 2^{20111111202220} is an apocalyptic number.

20111111202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111111202220 is an abundant number, since it is smaller than the sum of its proper divisors (23578544169380).

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

20111111202220 is a wasteful number, since it uses less digits than its factorization.

20111111202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34674329697 (or 34674329695 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20111111202220 its reverse (2220211111102), we get a palindrome (22331322313322).

The spelling of 20111111202220 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, two hundred two thousand, two hundred twenty".