20101011100100 has 72 divisors (see below), whose sum is σ = 49922651287488. Its totient is φ = 6881801443200.

The previous prime is 20101011100039. The next prime is 20101011100109. The reversal of 20101011100100 is 100111010102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20101011100109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20294687 + ... + 21262086.

Almost surely, 2^{20101011100100} is an apocalyptic number.

20101011100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101011100100 is an abundant number, since it is smaller than the sum of its proper divisors (29821640187388).

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

20101011100100 is a wasteful number, since it uses less digits than its factorization.

20101011100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41557485 (or 41557478 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 20101011100100 its reverse (100111010102), we get a palindrome (20201122110202).

The spelling of 20101011100100 in words is "twenty trillion, one hundred one billion, eleven million, one hundred thousand, one hundred".