2001221324 has 6 divisors (see below), whose sum is σ = 3502137324. Its totient is φ = 1000610660.

The previous prime is 2001221323. The next prime is 2001221363. The reversal of 2001221324 is 4231221002.

It is not an unprimeable number, because it can be changed into a prime (2001221323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250152662 + ... + 250152669.

It is an arithmetic number, because the mean of its divisors is an integer number (583689554).

Almost surely, 2^2001221324 is an apocalyptic number.

It is an amenable number.

2001221324 is a deficient number, since it is larger than the sum of its proper divisors (1500916000).

2001221324 is a wasteful number, since it uses less digits than its factorization.

2001221324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500305335 (or 500305333 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2001221324 is about 44735.0122834453. The cubic root of 2001221324 is about 1260.1774596781.

Adding to 2001221324 its reverse (4231221002), we get a palindrome (6232442326).

The spelling of 2001221324 in words is "two billion, one million, two hundred twenty-one thousand, three hundred twenty-four".