20001210101100 has 72 divisors (see below), whose sum is σ = 64300186555920. Its totient is φ = 5333656026240.

The previous prime is 20001210101077. The next prime is 20001210101129. The reversal of 20001210101100 is 110101210002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3703925097 + ... + 3703930496.

It is an arithmetic number, because the mean of its divisors is an integer number (893058146610).

Almost surely, 2^{20001210101100} is an apocalyptic number.

20001210101100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001210101100 is an abundant number, since it is smaller than the sum of its proper divisors (44298976454820).

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

20001210101100 is a wasteful number, since it uses less digits than its factorization.

20001210101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7407855616 (or 7407855603 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20001210101100 its reverse (110101210002), we get a palindrome (20111311311102).

The spelling of 20001210101100 in words is "twenty trillion, one billion, two hundred ten million, one hundred one thousand, one hundred".