2111132221 has 4 divisors (see below), whose sum is σ = 2303053344. Its totient is φ = 1919211100.

The previous prime is 2111132213. The next prime is 2111132239. The reversal of 2111132221 is 1222311112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2111132221 - 2³ = 2111132213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111132195 and 2111132204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111132291) 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, 95960545 + ... + 95960566.

It is an arithmetic number, because the mean of its divisors is an integer number (575763336).

Almost surely, 2^2111132221 is an apocalyptic number.

It is an amenable number.

2111132221 is a deficient number, since it is larger than the sum of its proper divisors (191921123).

2111132221 is a wasteful number, since it uses less digits than its factorization.

2111132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191921122.

The product of its digits is 48, while the sum is 16.

The square root of 2111132221 is about 45947.0588939053. The cubic root of 2111132221 is about 1282.8379862762.

Adding to 2111132221 its reverse (1222311112), we get a palindrome (3333443333).

The spelling of 2111132221 in words is "two billion, one hundred eleven million, one hundred thirty-two thousand, two hundred twenty-one".