40033120221 has 6 divisors (see below), whose sum is σ = 57825618110. Its totient is φ = 26688746808.

The previous prime is 40033120217. The next prime is 40033120229. The reversal of 40033120221 is 12202133004.

40033120221 is a `hidden beast` number, since 400 + 33 + 12 + 0 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 34219820196 + 5813300025 = 184986^2 + 76245^2 .

It is not a de Polignac number, because 40033120221 - 2² = 40033120217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40033120194 and 40033120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40033120229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2224062226 + ... + 2224062243.

Almost surely, 2^40033120221 is an apocalyptic number.

It is an amenable number.

40033120221 is a deficient number, since it is larger than the sum of its proper divisors (17792497889).

40033120221 is a wasteful number, since it uses less digits than its factorization.

40033120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4448124475 (or 4448124472 counting only the distinct ones).

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

Adding to 40033120221 its reverse (12202133004), we get a palindrome (52235253225).

The spelling of 40033120221 in words is "forty billion, thirty-three million, one hundred twenty thousand, two hundred twenty-one".