1220202449 has 2 divisors, whose sum is σ = 1220202450. Its totient is φ = 1220202448.

The previous prime is 1220202433. The next prime is 1220202457. The reversal of 1220202449 is 9442020221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1015569424 + 204633025 = 31868^2 + 14305^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220202449 - 2⁴ = 1220202433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220202349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610101224 + 610101225.

It is an arithmetic number, because the mean of its divisors is an integer number (610101225).

Almost surely, 2^1220202449 is an apocalyptic number.

It is an amenable number.

1220202449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220202449 is an equidigital number, since it uses as much as digits as its factorization.

1220202449 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 26.

The square root of 1220202449 is about 34931.3963219337. The cubic root of 1220202449 is about 1068.5888314633.

The spelling of 1220202449 in words is "one billion, two hundred twenty million, two hundred two thousand, four hundred forty-nine".