20111000111202 has 288 divisors, whose sum is σ = 56764614780864. Its totient is φ = 4691494080000.

The previous prime is 20111000111173. The next prime is 20111000111207. The reversal of 20111000111202 is 20211100011102.

It is not an unprimeable number, because it can be changed into a prime (20111000111207) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 19724952 + ... + 20719452.

It is an arithmetic number, because the mean of its divisors is an integer number (197099356878).

Almost surely, 2^{20111000111202} is an apocalyptic number.

20111000111202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111000111202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28382307390432).

20111000111202 is an abundant number, since it is smaller than the sum of its proper divisors (36653614669662).

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

20111000111202 is a wasteful number, since it uses less digits than its factorization.

20111000111202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994594 (or 994574 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111000111202 its reverse (20211100011102), we get a palindrome (40322100122304).

It can be divided in two parts, 20111000 and 111202, that added together give a palindrome (20222202).

The spelling of 20111000111202 in words is "twenty trillion, one hundred eleven billion, one hundred eleven thousand, two hundred two".