20001112201220 has 24 divisors (see below), whose sum is σ = 43450692024600. Its totient is φ = 7724567470592.

The previous prime is 20001112201171. The next prime is 20001112201223. The reversal of 20001112201220 is 2210221110002.

It can be written as a sum of positive squares in 4 ways, for example, as 513690425284 + 19487421775936 = 716722^2 + 4414456^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20001112201195 and 20001112201204.

It is not an unprimeable number, because it can be changed into a prime (20001112201223) 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, 17242337525 + ... + 17242338684.

It is an arithmetic number, because the mean of its divisors is an integer number (1810445501025).

Almost surely, 2^{20001112201220} is an apocalyptic number.

20001112201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001112201220 is an abundant number, since it is smaller than the sum of its proper divisors (23449579823380).

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

20001112201220 is a wasteful number, since it uses less digits than its factorization.

20001112201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34484676247 (or 34484676245 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20001112201220 its reverse (2210221110002), we get a palindrome (22211333311222).

The spelling of 20001112201220 in words is "twenty trillion, one billion, one hundred twelve million, two hundred one thousand, two hundred twenty".