2321221284 has 72 divisors (see below), whose sum is σ = 5989084920. Its totient is φ = 757765632.

The previous prime is 2321221283. The next prime is 2321221319. The reversal of 2321221284 is 4821221232.

It can be written as a sum of positive squares in 4 ways, for example, as 10304100 + 2310917184 = 3210^2 + 48072^2 .

It is not an unprimeable number, because it can be changed into a prime (2321221283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2092522 + ... + 2093630.

It is an arithmetic number, because the mean of its divisors is an integer number (83181735).

Almost surely, 2^2321221284 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 2321221284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2994542460).

2321221284 is an abundant number, since it is smaller than the sum of its proper divisors (3667863636).

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

2321221284 is a wasteful number, since it uses less digits than its factorization.

2321221284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2269 (or 2264 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 2321221284 is about 48179.0544116424. The cubic root of 2321221284 is about 1324.0534421950.

The spelling of 2321221284 in words is "two billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred eighty-four".