2121312032 has 48 divisors (see below), whose sum is σ = 4784193792. Its totient is φ = 906992640.

The previous prime is 2121312031. The next prime is 2121312041. The reversal of 2121312032 is 2302131212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121312032.

It is not an unprimeable number, because it can be changed into a prime (2121312031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86057 + ... + 107927.

It is an arithmetic number, because the mean of its divisors is an integer number (99670704).

Almost surely, 2^2121312032 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 2121312032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2392096896).

2121312032 is an abundant number, since it is smaller than the sum of its proper divisors (2662881760).

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

2121312032 is a wasteful number, since it uses less digits than its factorization.

2121312032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22321 (or 22313 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2121312032 is about 46057.7032862039. The cubic root of 2121312032 is about 1284.8966153002.

Adding to 2121312032 its reverse (2302131212), we get a palindrome (4423443244).

The spelling of 2121312032 in words is "two billion, one hundred twenty-one million, three hundred twelve thousand, thirty-two".