20111120100220 has 48 divisors (see below), whose sum is σ = 42632321614848. Its totient is φ = 7968468914240.

The previous prime is 20111120100217. The next prime is 20111120100251. The reversal of 20111120100220 is 2200102111102.

It is a self number, because there is not a number n which added to its sum of digits gives 20111120100220.

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, 21155325 + ... + 22085515.

It is an arithmetic number, because the mean of its divisors is an integer number (888173366976).

Almost surely, 2^{20111120100220} is an apocalyptic number.

20111120100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111120100220 is an abundant number, since it is smaller than the sum of its proper divisors (22521201514628).

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

20111120100220 is a wasteful number, since it uses less digits than its factorization.

20111120100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940410 (or 940408 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20111120100220 its reverse (2200102111102), we get a palindrome (22311222211322).

The spelling of 20111120100220 in words is "twenty trillion, one hundred eleven billion, one hundred twenty million, one hundred thousand, two hundred twenty".