240201221 has 6 divisors (see below), whose sum is σ = 260099730. Its totient is φ = 221724048.

The previous prime is 240201217. The next prime is 240201239. The reversal of 240201221 is 122102042.

It can be written as a sum of positive squares in 3 ways, for example, as 261121 + 239940100 = 511^2 + 15490^2 .

It is not a de Polignac number, because 240201221 - 2² = 240201217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240201196 and 240201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240201251) 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, 710486 + ... + 710823.

It is an arithmetic number, because the mean of its divisors is an integer number (43349955).

Almost surely, 2^240201221 is an apocalyptic number.

It is an amenable number.

240201221 is a deficient number, since it is larger than the sum of its proper divisors (19898509).

240201221 is a wasteful number, since it uses less digits than its factorization.

240201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421335 (or 1421322 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 240201221 is about 15498.4264039934. The cubic root of 240201221 is about 621.6201305728.

Adding to 240201221 its reverse (122102042), we get a palindrome (362303263).

The spelling of 240201221 in words is "two hundred forty million, two hundred one thousand, two hundred twenty-one".