201101100120 has 48 divisors (see below), whose sum is σ = 653578576560. Its totient is φ = 53626959936.

The previous prime is 201101100061. The next prime is 201101100127. The reversal of 201101100120 is 21001101102.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101100127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279306724 + ... + 279307443.

It is an arithmetic number, because the mean of its divisors is an integer number (13616220345).

Almost surely, 2^201101100120 is an apocalyptic number.

201101100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201101100120 is an abundant number, since it is smaller than the sum of its proper divisors (452477476440).

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

201101100120 is a wasteful number, since it uses less digits than its factorization.

201101100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558614184 (or 558614177 counting only the distinct ones).

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

Adding to 201101100120 its reverse (21001101102), we get a palindrome (222102201222).

The spelling of 201101100120 in words is "two hundred one billion, one hundred one million, one hundred thousand, one hundred twenty".