10449311221 has 2 divisors, whose sum is σ = 10449311222. Its totient is φ = 10449311220.

The previous prime is 10449311203. The next prime is 10449311261. The reversal of 10449311221 is 12211394401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7137884196 + 3311427025 = 84486^2 + 57545^2 .

It is a cyclic number.

It is not a de Polignac number, because 10449311221 - 2¹⁵ = 10449278453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10449311221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10449311261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5224655610 + 5224655611.

It is an arithmetic number, because the mean of its divisors is an integer number (5224655611).

Almost surely, 2^10449311221 is an apocalyptic number.

It is an amenable number.

10449311221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10449311221 is an equidigital number, since it uses as much as digits as its factorization.

10449311221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 10449311221 in words is "ten billion, four hundred forty-nine million, three hundred eleven thousand, two hundred twenty-one".