20011100012220 has 48 divisors (see below), whose sum is σ = 56178919359360. Its totient is φ = 5322213400896.

The previous prime is 20011100012209. The next prime is 20011100012317. The reversal of 20011100012220 is 2221000111002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 20011100012196 and 20011100012205.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 439975062 + ... + 440020541.

It is an arithmetic number, because the mean of its divisors is an integer number (1170394153320).

Almost surely, 2^{20011100012220} is an apocalyptic number.

20011100012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011100012220 is an abundant number, since it is smaller than the sum of its proper divisors (36167819347140).

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

20011100012220 is a wasteful number, since it uses less digits than its factorization.

20011100012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879995994 (or 879995992 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20011100012220 its reverse (2221000111002), we get a palindrome (22232100123222).

The spelling of 20011100012220 in words is "twenty trillion, eleven billion, one hundred million, twelve thousand, two hundred twenty".