20010111121112 has 64 divisors (see below), whose sum is σ = 43096823677440. Its totient is φ = 8532210182400.

The previous prime is 20010111121061. The next prime is 20010111121159. The reversal of 20010111121112 is 21112111101002.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18295037 + ... + 19357907.

It is an arithmetic number, because the mean of its divisors is an integer number (673387869960).

Almost surely, 2^{20010111121112} is an apocalyptic number.

It is an amenable number.

20010111121112 is an abundant number, since it is smaller than the sum of its proper divisors (23086712556328).

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

20010111121112 is a wasteful number, since it uses less digits than its factorization.

20010111121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064592 (or 1064588 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 20010111121112 its reverse (21112111101002), we get a palindrome (41122222222114).

The spelling of 20010111121112 in words is "twenty trillion, ten billion, one hundred eleven million, one hundred twenty-one thousand, one hundred twelve".