1220122289 has 2 divisors, whose sum is σ = 1220122290. Its totient is φ = 1220122288.

The previous prime is 1220122247. The next prime is 1220122313. The reversal of 1220122289 is 9822210221.

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., 850713889 + 369408400 = 29167^2 + 19220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220122289 - 2¹⁶ = 1220056753 is a prime.

It is a super-2 number, since 2×1220122289² = 2977396800229199042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220122489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610061144 + 610061145.

It is an arithmetic number, because the mean of its divisors is an integer number (610061145).

Almost surely, 2^1220122289 is an apocalyptic number.

It is an amenable number.

1220122289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220122289 is an equidigital number, since it uses as much as digits as its factorization.

1220122289 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 29.

The square root of 1220122289 is about 34930.2489112231. The cubic root of 1220122289 is about 1068.5654309867.

The spelling of 1220122289 in words is "one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred eighty-nine".