1223010121 has 4 divisors (see below), whose sum is σ = 1223814672. Its totient is φ = 1222205572.

The previous prime is 1223010091. The next prime is 1223010137. The reversal of 1223010121 is 1210103221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1210103221 = 10597 ⋅114193.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223010121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223010521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399991 + ... + 403036.

It is an arithmetic number, because the mean of its divisors is an integer number (305953668).

Almost surely, 2^1223010121 is an apocalyptic number.

It is an amenable number.

1223010121 is a deficient number, since it is larger than the sum of its proper divisors (804551).

1223010121 is an equidigital number, since it uses as much as digits as its factorization.

1223010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804550.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1223010121 is about 34971.5616036802. The cubic root of 1223010121 is about 1069.4078072278.

Adding to 1223010121 its reverse (1210103221), we get a palindrome (2433113342).

The spelling of 1223010121 in words is "one billion, two hundred twenty-three million, ten thousand, one hundred twenty-one".