140241221 has 2 divisors, whose sum is σ = 140241222. Its totient is φ = 140241220.

The previous prime is 140241209. The next prime is 140241287. The reversal of 140241221 is 122142041.

140241221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110145025 + 30096196 = 10495^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 140241221 - 2¹⁴ = 140224837 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 140241221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140241821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70120610 + 70120611.

It is an arithmetic number, because the mean of its divisors is an integer number (70120611).

Almost surely, 2^140241221 is an apocalyptic number.

It is an amenable number.

140241221 is a deficient number, since it is larger than the sum of its proper divisors (1).

140241221 is an equidigital number, since it uses as much as digits as its factorization.

140241221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 140241221 is about 11842.3486268561. The cubic root of 140241221 is about 519.5474625494.

Adding to 140241221 its reverse (122142041), we get a palindrome (262383262).

The spelling of 140241221 in words is "one hundred forty million, two hundred forty-one thousand, two hundred twenty-one".