221210000449 has 2 divisors, whose sum is σ = 221210000450. Its totient is φ = 221210000448.

The previous prime is 221210000393. The next prime is 221210000483. The reversal of 221210000449 is 944000012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199107826225 + 22102174224 = 446215^2 + 148668^2 .

It is a cyclic number.

It is not a de Polignac number, because 221210000449 - 2¹³ = 221209992257 is a prime.

It is not a weakly prime, because it can be changed into another prime (221210030449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605000224 + 110605000225.

It is an arithmetic number, because the mean of its divisors is an integer number (110605000225).

Almost surely, 2^221210000449 is an apocalyptic number.

It is an amenable number.

221210000449 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210000449 is an equidigital number, since it uses as much as digits as its factorization.

221210000449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 221210000449 in words is "two hundred twenty-one billion, two hundred ten million, four hundred forty-nine", and thus it is an aban number.