21202311121112 has 32 divisors (see below), whose sum is σ = 43425653573520. Its totient is φ = 9624683053440.

The previous prime is 21202311121097. The next prime is 21202311121151. The reversal of 21202311121112 is 21112111320212.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 159071663 + ... + 159204894.

Almost surely, 2^{21202311121112} is an apocalyptic number.

21202311121112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21202311121112 is an abundant number, since it is smaller than the sum of its proper divisors (22223342452408).

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

21202311121112 is a wasteful number, since it uses less digits than its factorization.

21202311121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318277331 (or 318277327 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 21202311121112 its reverse (21112111320212), we get a palindrome (42314422441324).

The spelling of 21202311121112 in words is "twenty-one trillion, two hundred two billion, three hundred eleven million, one hundred twenty-one thousand, one hundred twelve".