2101201836 has 48 divisors (see below), whose sum is σ = 5208053760. Its totient is φ = 657061120.

The previous prime is 2101201831. The next prime is 2101201841. The reversal of 2101201836 is 6381021012.

It is an interprime number because it is at equal distance from previous prime (2101201831) and next prime (2101201841).

It is not an unprimeable number, because it can be changed into a prime (2101201831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46885 + ... + 80003.

It is an arithmetic number, because the mean of its divisors is an integer number (108501120).

Almost surely, 2^2101201836 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 2101201836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2604026880).

2101201836 is an abundant number, since it is smaller than the sum of its proper divisors (3106851924).

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

2101201836 is a wasteful number, since it uses less digits than its factorization.

2101201836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33454 (or 33452 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2101201836 is about 45838.8681797446. The cubic root of 2101201836 is about 1280.8234114374.

Adding to 2101201836 its reverse (6381021012), we get a palindrome (8482222848).

The spelling of 2101201836 in words is "two billion, one hundred one million, two hundred one thousand, eight hundred thirty-six".