201232100020 has 96 divisors (see below), whose sum is σ = 504584640000. Its totient is φ = 65911701504.

The previous prime is 201232099987. The next prime is 201232100029. The reversal of 201232100020 is 20001232102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201232100029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2566356 + ... + 2643604.

It is an arithmetic number, because the mean of its divisors is an integer number (5256090000).

Almost surely, 2^201232100020 is an apocalyptic number.

201232100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201232100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252292320000).

201232100020 is an abundant number, since it is smaller than the sum of its proper divisors (303352539980).

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

201232100020 is a wasteful number, since it uses less digits than its factorization.

201232100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78097 (or 78095 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 201232100020 its reverse (20001232102), we get a palindrome (221233332122).

The spelling of 201232100020 in words is "two hundred one billion, two hundred thirty-two million, one hundred thousand, twenty".