20121111102112 has 24 divisors (see below), whose sum is σ = 39678698537856. Its totient is φ = 10043981314752.

The previous prime is 20121111102067. The next prime is 20121111102133. The reversal of 20121111102112 is 21120111112102.

It is a super-2 number, since 2×20121111102112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517925158 + ... + 517964005.

It is an arithmetic number, because the mean of its divisors is an integer number (1653279105744).

Almost surely, 2^{20121111102112} is an apocalyptic number.

It is an amenable number.

20121111102112 is a deficient number, since it is larger than the sum of its proper divisors (19557587435744).

20121111102112 is a wasteful number, since it uses less digits than its factorization.

20121111102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035889780 (or 1035889772 counting only the distinct ones).

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

Adding to 20121111102112 its reverse (21120111112102), we get a palindrome (41241222214214).

The spelling of 20121111102112 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred twelve".