2001321042 has 16 divisors (see below), whose sum is σ = 4574448192. Its totient is φ = 571806000.

The previous prime is 2001321041. The next prime is 2001321043. The reversal of 2001321042 is 2401231002.

It is an interprime number because it is at equal distance from previous prime (2001321041) and next prime (2001321043).

It is not an unprimeable number, because it can be changed into a prime (2001321041) 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 7 ways as a sum of consecutive naturals, for example, 23825209 + ... + 23825292.

It is an arithmetic number, because the mean of its divisors is an integer number (285903012).

Almost surely, 2^2001321042 is an apocalyptic number.

2001321042 is an abundant number, since it is smaller than the sum of its proper divisors (2573127150).

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

2001321042 is a wasteful number, since it uses less digits than its factorization.

2001321042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47650513.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2001321042 is about 44736.1268104426. The cubic root of 2001321042 is about 1260.1983902780.

Adding to 2001321042 its reverse (2401231002), we get a palindrome (4402552044).

The spelling of 2001321042 in words is "two billion, one million, three hundred twenty-one thousand, forty-two".