20011121011100 has 18 divisors (see below), whose sum is σ = 43424132594304. Its totient is φ = 8004448404400.

The previous prime is 20011121011087. The next prime is 20011121011139. The reversal of 20011121011100 is 111012111002.

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, 100055604956 + ... + 100055605155.

Almost surely, 2^{20011121011100} is an apocalyptic number.

20011121011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011121011100 is an abundant number, since it is smaller than the sum of its proper divisors (23413011583204).

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

20011121011100 is a wasteful number, since it uses less digits than its factorization.

20011121011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200111210125 (or 200111210118 counting only the distinct ones).

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

Adding to 20011121011100 its reverse (111012111002), we get a palindrome (20122133122102).

The spelling of 20011121011100 in words is "twenty trillion, eleven billion, one hundred twenty-one million, eleven thousand, one hundred".