2001121982 has 32 divisors (see below), whose sum is σ = 3163422720. Its totient is φ = 948205440.

The previous prime is 2001121981. The next prime is 2001121987. The reversal of 2001121982 is 2891211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001121981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620438 + ... + 623654.

It is an arithmetic number, because the mean of its divisors is an integer number (98856960).

Almost surely, 2^2001121982 is an apocalyptic number.

2001121982 is a deficient number, since it is larger than the sum of its proper divisors (1162300738).

2001121982 is a wasteful number, since it uses less digits than its factorization.

2001121982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 2001121982 is about 44733.9019313093. The cubic root of 2001121982 is about 1260.1566073084.

Adding to 2001121982 its reverse (2891211002), we get a palindrome (4892332984).

The spelling of 2001121982 in words is "two billion, one million, one hundred twenty-one thousand, nine hundred eighty-two".