2101201236 has 120 divisors (see below), whose sum is σ = 5623537920. Its totient is φ = 683961408.

The previous prime is 2101201183. The next prime is 2101201237. The reversal of 2101201236 is 6321021012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101201237) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2635990 + ... + 2636786.

It is an arithmetic number, because the mean of its divisors is an integer number (46862816).

Almost surely, 2^2101201236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2101201236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2811768960).

2101201236 is an abundant number, since it is smaller than the sum of its proper divisors (3522336684).

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

2101201236 is a wasteful number, since it uses less digits than its factorization.

2101201236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2101201236 is about 45838.8616350799. The cubic root of 2101201236 is about 1280.8232895240.

Adding to 2101201236 its reverse (6321021012), we get a palindrome (8422222248).

The spelling of 2101201236 in words is "two billion, one hundred one million, two hundred one thousand, two hundred thirty-six".