2121500444 has 48 divisors (see below), whose sum is σ = 4313164800. Its totient is φ = 894269376.

The previous prime is 2121500441. The next prime is 2121500453. The reversal of 2121500444 is 4440051212.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121500441) 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, 624302 + ... + 627690.

It is an arithmetic number, because the mean of its divisors is an integer number (89857600).

Almost surely, 2^2121500444 is an apocalyptic number.

It is an amenable number.

2121500444 is an abundant number, since it is smaller than the sum of its proper divisors (2191664356).

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

2121500444 is a wasteful number, since it uses less digits than its factorization.

2121500444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762 (or 3760 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2121500444 is about 46059.7486315329. The cubic root of 2121500444 is about 1284.9346550873.

Adding to 2121500444 its reverse (4440051212), we get a palindrome (6561551656).

The spelling of 2121500444 in words is "two billion, one hundred twenty-one million, five hundred thousand, four hundred forty-four".