20113220103100 has 144 divisors (see below), whose sum is σ = 48279980508480. Its totient is φ = 7238543872000.

The previous prime is 20113220103091. The next prime is 20113220103101. The reversal of 20113220103100 is 130102231102.

It is a super-2 number, since 2×20113220103100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113220103101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2959617 + ... + 6998983.

It is an arithmetic number, because the mean of its divisors is an integer number (335277642420).

Almost surely, 2^{20113220103100} is an apocalyptic number.

20113220103100 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 20113220103100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24139990254240).

20113220103100 is an abundant number, since it is smaller than the sum of its proper divisors (28166760405380).

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

20113220103100 is a wasteful number, since it uses less digits than its factorization.

20113220103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039528 (or 4039521 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20113220103100 its reverse (130102231102), we get a palindrome (20243322334202).

The spelling of 20113220103100 in words is "twenty trillion, one hundred thirteen billion, two hundred twenty million, one hundred three thousand, one hundred".