940010221 has 2 divisors, whose sum is σ = 940010222. Its totient is φ = 940010220.

The previous prime is 940010209. The next prime is 940010231. The reversal of 940010221 is 122010049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 522625321 + 417384900 = 22861^2 + 20430^2 .

It is a cyclic number.

It is not a de Polignac number, because 940010221 - 2⁹ = 940009709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940010231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470005110 + 470005111.

It is an arithmetic number, because the mean of its divisors is an integer number (470005111).

Almost surely, 2^940010221 is an apocalyptic number.

It is an amenable number.

940010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

940010221 is an equidigital number, since it uses as much as digits as its factorization.

940010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 940010221 is about 30659.5861191895. The cubic root of 940010221 is about 979.5896591813.

The spelling of 940010221 in words is "nine hundred forty million, ten thousand, two hundred twenty-one".