1220123266 has 8 divisors (see below), whose sum is σ = 1926510480. Its totient is φ = 577953108.

The previous prime is 1220123257. The next prime is 1220123273. The reversal of 1220123266 is 6623210221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1220123266.

It is an unprimeable number.

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, 16054216 + ... + 16054291.

It is an arithmetic number, because the mean of its divisors is an integer number (240813810).

Almost surely, 2^1220123266 is an apocalyptic number.

1220123266 is a deficient number, since it is larger than the sum of its proper divisors (706387214).

1220123266 is a wasteful number, since it uses less digits than its factorization.

1220123266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32108528.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 1220123266 is about 34930.2628962337. The cubic root of 1220123266 is about 1068.5657162008.

Adding to 1220123266 its reverse (6623210221), we get a palindrome (7843333487).

The spelling of 1220123266 in words is "one billion, two hundred twenty million, one hundred twenty-three thousand, two hundred sixty-six".