2011423221 has 24 divisors (see below), whose sum is σ = 3128448960. Its totient is φ = 1240672896.

The previous prime is 2011423217. The next prime is 2011423237. The reversal of 2011423221 is 1223241102.

It is a happy number.

2011423221 is a `hidden beast` number, since 20 + 1 + 1 + 423 + 221 = 666.

It is not a de Polignac number, because 2011423221 - 2² = 2011423217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011423194 and 2011423203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011423291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102385 + ... + 120438.

It is an arithmetic number, because the mean of its divisors is an integer number (130352040).

Almost surely, 2^2011423221 is an apocalyptic number.

It is an amenable number.

2011423221 is a deficient number, since it is larger than the sum of its proper divisors (1117025739).

2011423221 is a wasteful number, since it uses less digits than its factorization.

2011423221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222905 (or 222902 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2011423221 is about 44848.8931970456. The cubic root of 2011423221 is about 1262.3152235673.

Adding to 2011423221 its reverse (1223241102), we get a palindrome (3234664323).

The spelling of 2011423221 in words is "two billion, eleven million, four hundred twenty-three thousand, two hundred twenty-one".