1222021249 has 2 divisors, whose sum is σ = 1222021250. Its totient is φ = 1222021248.

The previous prime is 1222021223. The next prime is 1222021267. The reversal of 1222021249 is 9421202221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 965220624 + 256800625 = 31068^2 + 16025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222021249 - 2⁷ = 1222021121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611010624 + 611010625.

It is an arithmetic number, because the mean of its divisors is an integer number (611010625).

Almost surely, 2^1222021249 is an apocalyptic number.

It is an amenable number.

1222021249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222021249 is an equidigital number, since it uses as much as digits as its factorization.

1222021249 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 square root of 1222021249 is about 34957.4205141054. The cubic root of 1222021249 is about 1069.1195041945.

The spelling of 1222021249 in words is "one billion, two hundred twenty-two million, twenty-one thousand, two hundred forty-nine".