20011112011220 has 24 divisors (see below), whose sum is σ = 45843638426208. Its totient is φ = 7276768004000.

The previous prime is 20011112011171. The next prime is 20011112011223. The reversal of 20011112011220 is 2211021111002.

It is a junction number, because it is equal to n+sod(n) for n = 20011112011195 and 20011112011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011112011223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45479799806 + ... + 45479800245.

It is an arithmetic number, because the mean of its divisors is an integer number (1910151601092).

Almost surely, 2^{20011112011220} is an apocalyptic number.

20011112011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011112011220 is an abundant number, since it is smaller than the sum of its proper divisors (25832526414988).

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

20011112011220 is a wasteful number, since it uses less digits than its factorization.

20011112011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90959600071 (or 90959600069 counting only the distinct ones).

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

Adding to 20011112011220 its reverse (2211021111002), we get a palindrome (22222133122222).

The spelling of 20011112011220 in words is "twenty trillion, eleven billion, one hundred twelve million, eleven thousand, two hundred twenty".