20111111202 has 192 divisors, whose sum is σ = 51871276800. Its totient is φ = 5085130752.

The previous prime is 20111111191. The next prime is 20111111227. The reversal of 20111111202 is 20211111102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19171174 + ... + 19172222.

It is an arithmetic number, because the mean of its divisors is an integer number (270162900).

Almost surely, 2^20111111202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111111202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25935638400).

20111111202 is an abundant number, since it is smaller than the sum of its proper divisors (31760165598).

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

20111111202 is a wasteful number, since it uses less digits than its factorization.

20111111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1184 counting only the distinct ones).

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

Adding to 20111111202 its reverse (20211111102), we get a palindrome (40322222304).

The spelling of 20111111202 in words is "twenty billion, one hundred eleven million, one hundred eleven thousand, two hundred two".