20011102012100 has 18 divisors (see below), whose sum is σ = 43424091366474. Its totient is φ = 8004440804800.

The previous prime is 20011102012091. The next prime is 20011102012147. The reversal of 20011102012100 is 121020111002.

It can be written as a sum of positive squares in 3 ways, for example, as 398090331136 + 19613011680964 = 630944^2 + 4428658^2 .

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, 100055509961 + ... + 100055510160.

Almost surely, 2^{20011102012100} is an apocalyptic number.

20011102012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011102012100 is an abundant number, since it is smaller than the sum of its proper divisors (23412989354374).

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

20011102012100 is a wasteful number, since it uses less digits than its factorization.

20011102012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200111020135 (or 200111020128 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20011102012100 its reverse (121020111002), we get a palindrome (20132122123102).

The spelling of 20011102012100 in words is "twenty trillion, eleven billion, one hundred two million, twelve thousand, one hundred".