20113121333220 has 96 divisors (see below), whose sum is σ = 57328714396800. Its totient is φ = 5267302877184.

The previous prime is 20113121333191. The next prime is 20113121333231. The reversal of 20113121333220 is 2233312131102.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 679996 + ... + 6378764.

It is an arithmetic number, because the mean of its divisors is an integer number (597174108300).

Almost surely, 2^{20113121333220} is an apocalyptic number.

20113121333220 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 20113121333220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28664357198400).

20113121333220 is an abundant number, since it is smaller than the sum of its proper divisors (37215593063580).

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

20113121333220 is a wasteful number, since it uses less digits than its factorization.

20113121333220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5699837 (or 5699835 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 20113121333220 its reverse (2233312131102), we get a palindrome (22346433464322).

The spelling of 20113121333220 in words is "twenty trillion, one hundred thirteen billion, one hundred twenty-one million, three hundred thirty-three thousand, two hundred twenty".