2121331032 has 160 divisors (see below), whose sum is σ = 6233436000. Its totient is φ = 672731136.

The previous prime is 2121331031. The next prime is 2121331049. The reversal of 2121331032 is 2301331212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2121330996 and 2121331014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121331031) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 4724344 + ... + 4724792.

It is an arithmetic number, because the mean of its divisors is an integer number (38958975).

Almost surely, 2^2121331032 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 2121331032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3116718000).

2121331032 is an abundant number, since it is smaller than the sum of its proper divisors (4112104968).

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

2121331032 is a wasteful number, since it uses less digits than its factorization.

2121331032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2121331032 is about 46057.9095487409. The cubic root of 2121331032 is about 1284.9004514423.

Adding to 2121331032 its reverse (2301331212), we get a palindrome (4422662244).

The spelling of 2121331032 in words is "two billion, one hundred twenty-one million, three hundred thirty-one thousand, thirty-two".