1223310121 has 16 divisors (see below), whose sum is σ = 1348449408. Its totient is φ = 1109705520.

The previous prime is 1223310097. The next prime is 1223310149. The reversal of 1223310121 is 1210133221.

It is not a de Polignac number, because 1223310121 - 2⁹ = 1223309609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223310095 and 1223310104.

It is not an unprimeable number, because it can be changed into a prime (1223310521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 988315 + ... + 989551.

It is an arithmetic number, because the mean of its divisors is an integer number (84278088).

Almost surely, 2^1223310121 is an apocalyptic number.

1223310121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223310121 is a deficient number, since it is larger than the sum of its proper divisors (125139287).

1223310121 is an equidigital number, since it uses as much as digits as its factorization.

1223310121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2013 (or 1991 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1223310121 is about 34975.8505400512. The cubic root of 1223310121 is about 1069.4952407135.

Adding to 1223310121 its reverse (1210133221), we get a palindrome (2433443342).

Subtracting from 1223310121 its reverse (1210133221), we obtain a square (13176900 = 3630²).

The spelling of 1223310121 in words is "one billion, two hundred twenty-three million, three hundred ten thousand, one hundred twenty-one".