20112112011100 has 36 divisors (see below), whose sum is σ = 43780959104904. Its totient is φ = 8019466732480.

The previous prime is 20112112011091. The next prime is 20112112011161. The reversal of 20112112011100 is 111021121102.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 317194042 + ... + 317257441.

It is an arithmetic number, because the mean of its divisors is an integer number (1216137752914).

Almost surely, 2^{20112112011100} is an apocalyptic number.

20112112011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112112011100 is an abundant number, since it is smaller than the sum of its proper divisors (23668847093804).

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

20112112011100 is a wasteful number, since it uses less digits than its factorization.

20112112011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634451814 (or 634451807 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20112112011100 its reverse (111021121102), we get a palindrome (20223133132202).

The spelling of 20112112011100 in words is "twenty trillion, one hundred twelve billion, one hundred twelve million, eleven thousand, one hundred".