20111111012012 has 96 divisors (see below), whose sum is σ = 38262640066560. Its totient is φ = 9217780992000.

The previous prime is 20111111011991. The next prime is 20111111012033. The reversal of 20111111012012 is 21021011111102.

It is an interprime number because it is at equal distance from previous prime (20111111011991) and next prime (20111111012033).

It is a super-2 number, since 2×20111111012012² (a number of 27 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 200517437 + ... + 200617707.

It is an arithmetic number, because the mean of its divisors is an integer number (398569167360).

Almost surely, 2^{20111111012012} is an apocalyptic number.

It is an amenable number.

20111111012012 is a deficient number, since it is larger than the sum of its proper divisors (18151529054548).

20111111012012 is a wasteful number, since it uses less digits than its factorization.

20111111012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100863 (or 100861 counting only the distinct ones).

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

Adding to 20111111012012 its reverse (21021011111102), we get a palindrome (41132122123114).

The spelling of 20111111012012 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, twelve thousand, twelve".