2121325144 has 64 divisors (see below), whose sum is σ = 4513579200. Its totient is φ = 929009664.

The previous prime is 2121325111. The next prime is 2121325169. The reversal of 2121325144 is 4415231212.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 106572 + ... + 124900.

It is an arithmetic number, because the mean of its divisors is an integer number (70524675).

Almost surely, 2^2121325144 is an apocalyptic number.

It is an amenable number.

2121325144 is an abundant number, since it is smaller than the sum of its proper divisors (2392254056).

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

2121325144 is a wasteful number, since it uses less digits than its factorization.

2121325144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18412 (or 18408 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 2121325144 is about 46057.8456291651. The cubic root of 2121325144 is about 1284.8992626445.

Adding to 2121325144 its reverse (4415231212), we get a palindrome (6536556356).

The spelling of 2121325144 in words is "two billion, one hundred twenty-one million, three hundred twenty-five thousand, one hundred forty-four".