20111201120100 has 72 divisors (see below), whose sum is σ = 60718339402560. Its totient is φ = 5129813617280.

The previous prime is 20111201120033. The next prime is 20111201120107. The reversal of 20111201120100 is 102110211102.

It is a super-2 number, since 2×20111201120100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20111201120107) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1457326515 + ... + 1457340314.

It is an arithmetic number, because the mean of its divisors is an integer number (843310269480).

Almost surely, 2^{20111201120100} is an apocalyptic number.

20111201120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111201120100 is an abundant number, since it is smaller than the sum of its proper divisors (40607138282460).

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

20111201120100 is a wasteful number, since it uses less digits than its factorization.

20111201120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914666869 (or 2914666862 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111201120100 its reverse (102110211102), we get a palindrome (20213311331202).

The spelling of 20111201120100 in words is "twenty trillion, one hundred eleven billion, two hundred one million, one hundred twenty thousand, one hundred".