2001121330 has 16 divisors (see below), whose sum is σ = 3879096984. Its totient is φ = 738875520.

The previous prime is 2001121319. The next prime is 2001121379. The reversal of 2001121330 is 331211002.

It can be written as a sum of positive squares in 4 ways, for example, as 1105496001 + 895625329 = 33249^2 + 29927^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 2001121330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7696491 + ... + 7696750.

Almost surely, 2^2001121330 is an apocalyptic number.

2001121330 is a deficient number, since it is larger than the sum of its proper divisors (1877975654).

2001121330 is a wasteful number, since it uses less digits than its factorization.

2001121330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15393261.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2001121330 is about 44733.8946437710. The cubic root of 2001121330 is about 1260.1564704481.

Adding to 2001121330 its reverse (331211002), we get a palindrome (2332332332).

The spelling of 2001121330 in words is "two billion, one million, one hundred twenty-one thousand, three hundred thirty".