20201100222100 has 144 divisors (see below), whose sum is σ = 50239249482240. Its totient is φ = 6906673152000.

The previous prime is 20201100222089. The next prime is 20201100222203. The reversal of 20201100222100 is 122200110202.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2104057300 + ... + 2104066900.

It is an arithmetic number, because the mean of its divisors is an integer number (348883676960).

Almost surely, 2^{20201100222100} is an apocalyptic number.

20201100222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201100222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25119624741120).

20201100222100 is an abundant number, since it is smaller than the sum of its proper divisors (30038149260140).

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

20201100222100 is a wasteful number, since it uses less digits than its factorization.

20201100222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17738 (or 17731 counting only the distinct ones).

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

Adding to 20201100222100 its reverse (122200110202), we get a palindrome (20323300332302).

The spelling of 20201100222100 in words is "twenty trillion, two hundred one billion, one hundred million, two hundred twenty-two thousand, one hundred".