1121220449 has 2 divisors, whose sum is σ = 1121220450. Its totient is φ = 1121220448.

The previous prime is 1121220413. The next prime is 1121220479. The reversal of 1121220449 is 9440221211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119370849 + 1849600 = 33457^2 + 1360^2 .

It is an emirp because it is prime and its reverse (9440221211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121220449 - 2²⁰ = 1120171873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121220409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560610224 + 560610225.

It is an arithmetic number, because the mean of its divisors is an integer number (560610225).

Almost surely, 2^1121220449 is an apocalyptic number.

It is an amenable number.

1121220449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121220449 is an equidigital number, since it uses as much as digits as its factorization.

1121220449 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 26.

The square root of 1121220449 is about 33484.6300412592. The cubic root of 1121220449 is about 1038.8758961906.

The spelling of 1121220449 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, four hundred forty-nine".