20021220201100 has 18 divisors (see below), whose sum is σ = 43446047836604. Its totient is φ = 8008488080400.

The previous prime is 20021220201071. The next prime is 20021220201119. The reversal of 20021220201100 is 110202212002.

It is a happy 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 5 ways as a sum of consecutive naturals, for example, 100106100906 + ... + 100106101105.

Almost surely, 2^{20021220201100} is an apocalyptic number.

20021220201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021220201100 is an abundant number, since it is smaller than the sum of its proper divisors (23424827635504).

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

20021220201100 is a wasteful number, since it uses less digits than its factorization.

20021220201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200212202025 (or 200212202018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20021220201100 its reverse (110202212002), we get a palindrome (20131422413102).

The spelling of 20021220201100 in words is "twenty trillion, twenty-one billion, two hundred twenty million, two hundred one thousand, one hundred".