20111120222202 has 144 divisors (see below), whose sum is σ = 45528315799200. Its totient is φ = 6662229406560.

The previous prime is 20111120222191. The next prime is 20111120222203. The reversal of 20111120222202 is 20222202111102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20111120222203) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2046095424 + ... + 2046105252.

Almost surely, 2^{20111120222202} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111120222202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22764157899600).

20111120222202 is an abundant number, since it is smaller than the sum of its proper divisors (25417195576998).

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

20111120222202 is an frugal number, since it uses more digits than its factorization.

20111120222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10805 (or 10784 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20111120222202 its reverse (20222202111102), we get a palindrome (40333322333304).

The spelling of 20111120222202 in words is "twenty trillion, one hundred eleven billion, one hundred twenty million, two hundred twenty-two thousand, two hundred two".