221121202249 has 2 divisors, whose sum is σ = 221121202250. Its totient is φ = 221121202248.

The previous prime is 221121202219. The next prime is 221121202277. The reversal of 221121202249 is 942202121122.

It is an a-pointer prime, because the next prime (221121202277) can be obtained adding 221121202249 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164872542025 + 56248660224 = 406045^2 + 237168^2 .

It is a cyclic number.

It is not a de Polignac number, because 221121202249 - 2¹⁷ = 221121071177 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121202219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560601124 + 110560601125.

It is an arithmetic number, because the mean of its divisors is an integer number (110560601125).

Almost surely, 2^221121202249 is an apocalyptic number.

It is an amenable number.

221121202249 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121202249 is an equidigital number, since it uses as much as digits as its factorization.

221121202249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 221121202249 in words is "two hundred twenty-one billion, one hundred twenty-one million, two hundred two thousand, two hundred forty-nine".