20001121201112 has 32 divisors (see below), whose sum is σ = 38211186862080. Its totient is φ = 9811486164480.

The previous prime is 20001121201111. The next prime is 20001121201177. The reversal of 20001121201112 is 21110212110002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001121201111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10058537 + ... + 11881767.

It is an arithmetic number, because the mean of its divisors is an integer number (1194099589440).

Almost surely, 2^{20001121201112} is an apocalyptic number.

It is an amenable number.

20001121201112 is a deficient number, since it is larger than the sum of its proper divisors (18210065660968).

20001121201112 is a wasteful number, since it uses less digits than its factorization.

20001121201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849163 (or 1849159 counting only the distinct ones).

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

Adding to 20001121201112 its reverse (21110212110002), we get a palindrome (41111333311114).

The spelling of 20001121201112 in words is "twenty trillion, one billion, one hundred twenty-one million, two hundred one thousand, one hundred twelve".