1220661122 has 8 divisors (see below), whose sum is σ = 1836768636. Its totient is φ = 608404912.

The previous prime is 1220661121. The next prime is 1220661133. The reversal of 1220661122 is 2211660221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1217242321 + 3418801 = 34889^2 + 1849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1220661121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962033 + ... + 963300.

Almost surely, 2^1220661122 is an apocalyptic number.

1220661122 is a deficient number, since it is larger than the sum of its proper divisors (616107514).

1220661122 is a wasteful number, since it uses less digits than its factorization.

1220661122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925652.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1220661122 is about 34937.9610452585. The cubic root of 1220661122 is about 1068.7227085492.

Subtracting 1220661122 from its reverse (2211660221), we obtain a palindrome (990999099).

The spelling of 1220661122 in words is "one billion, two hundred twenty million, six hundred sixty-one thousand, one hundred twenty-two".