20001121100112 has 20 divisors (see below), whose sum is σ = 51669562842080. Its totient is φ = 6667040366688.

The previous prime is 20001121100099. The next prime is 20001121100113. The reversal of 20001121100112 is 21100112110002.

It is a super-2 number, since 2×20001121100112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001121100113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208345011412 + ... + 208345011507.

It is an arithmetic number, because the mean of its divisors is an integer number (2583478142104).

Almost surely, 2^{20001121100112} is an apocalyptic number.

It is an amenable number.

20001121100112 is an abundant number, since it is smaller than the sum of its proper divisors (31668441741968).

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

20001121100112 is a wasteful number, since it uses less digits than its factorization.

20001121100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416690022930 (or 416690022924 counting only the distinct ones).

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

Adding to 20001121100112 its reverse (21100112110002), we get a palindrome (41101233210114).

The spelling of 20001121100112 in words is "twenty trillion, one billion, one hundred twenty-one million, one hundred thousand, one hundred twelve".