20112111010220 has 48 divisors (see below), whose sum is σ = 44076056713920. Its totient is φ = 7694317694976.

The previous prime is 20112111010177. The next prime is 20112111010261. The reversal of 20112111010220 is 2201011121102.

It is a junction number, because it is equal to n+sod(n) for n = 20112111010195 and 20112111010204.

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, 2597576 + ... + 6853584.

It is an arithmetic number, because the mean of its divisors is an integer number (918251181540).

Almost surely, 2^{20112111010220} is an apocalyptic number.

20112111010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112111010220 is an abundant number, since it is smaller than the sum of its proper divisors (23963945703700).

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

20112111010220 is a wasteful number, since it uses less digits than its factorization.

20112111010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266314 (or 4266312 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20112111010220 its reverse (2201011121102), we get a palindrome (22313122131322).

The spelling of 20112111010220 in words is "twenty trillion, one hundred twelve billion, one hundred eleven million, ten thousand, two hundred twenty".