2001122331 has 8 divisors (see below), whose sum is σ = 2873406480. Its totient is φ = 1231459872.

The previous prime is 2001122327. The next prime is 2001122339. The reversal of 2001122331 is 1332211002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2001122331 - 2² = 2001122327 is a prime.

It is a super-2 number, since 2×2001122331² = 8008981167253747122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2001122331.

It is not an unprimeable number, because it can be changed into a prime (2001122339) 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, 25655376 + ... + 25655453.

It is an arithmetic number, because the mean of its divisors is an integer number (359175810).

Almost surely, 2^2001122331 is an apocalyptic number.

2001122331 is a deficient number, since it is larger than the sum of its proper divisors (872284149).

2001122331 is a wasteful number, since it uses less digits than its factorization.

2001122331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51310845.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2001122331 is about 44733.9058321538. The cubic root of 2001122331 is about 1260.1566805664.

Adding to 2001122331 its reverse (1332211002), we get a palindrome (3333333333).

The spelling of 2001122331 in words is "two billion, one million, one hundred twenty-two thousand, three hundred thirty-one".