4001233221 has 40 divisors (see below), whose sum is σ = 6051529440. Its totient is φ = 2634459552.

The previous prime is 4001233217. The next prime is 4001233259. The reversal of 4001233221 is 1223321004.

4001233221 is a `hidden beast` number, since 400 + 12 + 33 + 221 = 666.

It is not a de Polignac number, because 4001233221 - 2² = 4001233217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4001233194 and 4001233203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001233261) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4411050 + ... + 4411956.

It is an arithmetic number, because the mean of its divisors is an integer number (151288236).

Almost surely, 2^4001233221 is an apocalyptic number.

It is an amenable number.

4001233221 is a deficient number, since it is larger than the sum of its proper divisors (2050296219).

4001233221 is a wasteful number, since it uses less digits than its factorization.

4001233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 4001233221 is about 63255.3019200762. The cubic root of 4001233221 is about 1587.5641698987.

Adding to 4001233221 its reverse (1223321004), we get a palindrome (5224554225).

The spelling of 4001233221 in words is "four billion, one million, two hundred thirty-three thousand, two hundred twenty-one".