2011222231 has 4 divisors (see below), whose sum is σ = 2011314112. Its totient is φ = 2011130352.

The previous prime is 2011222229. The next prime is 2011222237. The reversal of 2011222231 is 1322221102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2011222231 - 2¹ = 2011222229 is a prime.

It is a super-2 number, since 2×2011222231² = 8090029724937234722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011222237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8026 + ... + 63928.

It is an arithmetic number, because the mean of its divisors is an integer number (502828528).

Almost surely, 2^2011222231 is an apocalyptic number.

2011222231 is a deficient number, since it is larger than the sum of its proper divisors (91881).

2011222231 is an equidigital number, since it uses as much as digits as its factorization.

2011222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91880.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2011222231 is about 44846.6523945768. The cubic root of 2011222231 is about 1262.2731768571.

Adding to 2011222231 its reverse (1322221102), we get a palindrome (3333443333).

The spelling of 2011222231 in words is "two billion, eleven million, two hundred twenty-two thousand, two hundred thirty-one".