2001122011 has 4 divisors (see below), whose sum is σ = 2286996592. Its totient is φ = 1715247432.

The previous prime is 2001121999. The next prime is 2001122069. The reversal of 2001122011 is 1102211002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001122011 - 2⁷ = 2001121883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001128011) 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 3 ways as a sum of consecutive naturals, for example, 142937280 + ... + 142937293.

It is an arithmetic number, because the mean of its divisors is an integer number (571749148).

Almost surely, 2^2001122011 is an apocalyptic number.

2001122011 is a deficient number, since it is larger than the sum of its proper divisors (285874581).

2001122011 is an equidigital number, since it uses as much as digits as its factorization.

2001122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285874580.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2001122011 is about 44733.9022554483. The cubic root of 2001122011 is about 1260.1566133957.

Adding to 2001122011 its reverse (1102211002), we get a palindrome (3103333013).

It can be divided in two parts, 200 and 1122011, that added together give a palindrome (1122211).

The spelling of 2001122011 in words is "two billion, one million, one hundred twenty-two thousand, eleven".