1221123 has 8 divisors (see below), whose sum is σ = 1656000. Its totient is φ = 800168.

The previous prime is 1221119. The next prime is 1221131. The reversal of 1221123 is 3211221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221123 - 2² = 1221119 is a prime.

It is a super-2 number, since 2×1221123² = 2982282762258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221099 and 1221108.

It is not an unprimeable number, because it can be changed into a prime (1221113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3273 + ... + 3626.

It is an arithmetic number, because the mean of its divisors is an integer number (207000).

2^1221123 is an apocalyptic number.

1221123 is a deficient number, since it is larger than the sum of its proper divisors (434877).

1221123 is an equidigital number, since it uses as much as digits as its factorization.

1221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6961.

The product of its digits is 24, while the sum is 12.

The square root of 1221123 is about 1105.0443430017. The cubic root of 1221123 is about 106.8857487223.

Adding to 1221123 its reverse (3211221), we get a palindrome (4432344).

The spelling of 1221123 in words is "one million, two hundred twenty-one thousand, one hundred twenty-three".