2101210240 has 32 divisors (see below), whose sum is σ = 5023207260. Its totient is φ = 840483840.

The previous prime is 2101210211. The next prime is 2101210259. The reversal of 2101210240 is 420121012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1994872896 + 106337344 = 44664^2 + 10312^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2101210240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640931 + ... + 1642210.

Almost surely, 2^2101210240 is an apocalyptic number.

2101210240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101210240 is an abundant number, since it is smaller than the sum of its proper divisors (2921997020).

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

2101210240 is an equidigital number, since it uses as much as digits as its factorization.

2101210240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283160 (or 3283148 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2101210240 is about 45838.9598485830. The cubic root of 2101210240 is about 1280.8251190356.

Adding to 2101210240 its reverse (420121012), we get a palindrome (2521331252).

The spelling of 2101210240 in words is "two billion, one hundred one million, two hundred ten thousand, two hundred forty".