2001122311 has 8 divisors (see below), whose sum is σ = 2019865680. Its totient is φ = 1982397312.

The previous prime is 2001122303. The next prime is 2001122327. The reversal of 2001122311 is 1132211002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001122311 - 2³ = 2001122303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001122291 and 2001122300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001122341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318145 + ... + 324373.

It is an arithmetic number, because the mean of its divisors is an integer number (252483210).

Almost surely, 2^2001122311 is an apocalyptic number.

2001122311 is a deficient number, since it is larger than the sum of its proper divisors (18743369).

2001122311 is a wasteful number, since it uses less digits than its factorization.

2001122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9185.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2001122311 is about 44733.9056086097. The cubic root of 2001122311 is about 1260.1566763682.

Adding to 2001122311 its reverse (1132211002), we get a palindrome (3133333313).

The spelling of 2001122311 in words is "two billion, one million, one hundred twenty-two thousand, three hundred eleven".