1121220949 has 2 divisors, whose sum is σ = 1121220950. Its totient is φ = 1121220948.

The previous prime is 1121220923. The next prime is 1121220959. The reversal of 1121220949 is 9490221211.

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., 1058526225 + 62694724 = 32535^2 + 7918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121220949 - 2¹⁵ = 1121188181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121220949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121220959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560610474 + 560610475.

It is an arithmetic number, because the mean of its divisors is an integer number (560610475).

Almost surely, 2^1121220949 is an apocalyptic number.

It is an amenable number.

1121220949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121220949 is an equidigital number, since it uses as much as digits as its factorization.

1121220949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1121220949 is about 33484.6375073705. The cubic root of 1121220949 is about 1038.8760506169.

The spelling of 1121220949 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, nine hundred forty-nine".