2001222311 has 8 divisors (see below), whose sum is σ = 2184931344. Its totient is φ = 1817809920.

The previous prime is 2001222277. The next prime is 2001222317. The reversal of 2001222311 is 1132221002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001222311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001222317) 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, 59930 + ... + 87143.

It is an arithmetic number, because the mean of its divisors is an integer number (273116418).

Almost surely, 2^2001222311 is an apocalyptic number.

2001222311 is a deficient number, since it is larger than the sum of its proper divisors (183709033).

2001222311 is a wasteful number, since it uses less digits than its factorization.

2001222311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148321.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2001222311 is about 44735.0233150716. The cubic root of 2001222311 is about 1260.1776668508.

Adding to 2001222311 its reverse (1132221002), we get a palindrome (3133443313).

The spelling of 2001222311 in words is "two billion, one million, two hundred twenty-two thousand, three hundred eleven".