20111010111200 has 36 divisors (see below), whose sum is σ = 49096003435920. Its totient is φ = 8044404044160.

The previous prime is 20111010111169. The next prime is 20111010111221. The reversal of 20111010111200 is 211101011102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12569380520 + ... + 12569382119.

It is an arithmetic number, because the mean of its divisors is an integer number (1363777873220).

Almost surely, 2^{20111010111200} is an apocalyptic number.

20111010111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111010111200 is an abundant number, since it is smaller than the sum of its proper divisors (28984993324720).

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

20111010111200 is a wasteful number, since it uses less digits than its factorization.

20111010111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25138762659 (or 25138762646 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20111010111200 its reverse (211101011102), we get a palindrome (20322111122302).

The spelling of 20111010111200 in words is "twenty trillion, one hundred eleven billion, ten million, one hundred eleven thousand, two hundred".