1220122225 has 12 divisors (see below), whose sum is σ = 1729087744. Its totient is φ = 836655120.

The previous prime is 1220122217. The next prime is 1220122231. The reversal of 1220122225 is 5222210221.

It is not a de Polignac number, because 1220122225 - 2³ = 1220122217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3485889 + ... + 3486238.

Almost surely, 2^1220122225 is an apocalyptic number.

It is an amenable number.

1220122225 is a deficient number, since it is larger than the sum of its proper divisors (508965519).

1220122225 is an equidigital number, since it uses as much as digits as its factorization.

1220122225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6972144 (or 6972139 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1220122225 is about 34930.2479951116. The cubic root of 1220122225 is about 1068.5654123033.

Adding to 1220122225 its reverse (5222210221), we get a palindrome (6442332446).

The spelling of 1220122225 in words is "one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twenty-five".