20122120111100 has 108 divisors (see below), whose sum is σ = 50373618496656. Its totient is φ = 6834533134080.

The previous prime is 20122120111081. The next prime is 20122120111139. The reversal of 20122120111100 is 111102122102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6758912 + ... + 9269688.

Almost surely, 2^{20122120111100} is an apocalyptic number.

20122120111100 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 20122120111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25186809248328).

20122120111100 is an abundant number, since it is smaller than the sum of its proper divisors (30251498385556).

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

20122120111100 is a wasteful number, since it uses less digits than its factorization.

20122120111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511012 (or 2510898 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20122120111100 its reverse (111102122102), we get a palindrome (20233222233202).

The spelling of 20122120111100 in words is "twenty trillion, one hundred twenty-two billion, one hundred twenty million, one hundred eleven thousand, one hundred".