1221223023 has 24 divisors (see below), whose sum is σ = 1789875360. Its totient is φ = 802264320.

The previous prime is 1221223013. The next prime is 1221223039. The reversal of 1221223023 is 3203221221.

It is not a de Polignac number, because 1221223023 - 2¹⁰ = 1221221999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221222987 and 1221223005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221223013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248278 + ... + 253148.

It is an arithmetic number, because the mean of its divisors is an integer number (74578140).

Almost surely, 2^1221223023 is an apocalyptic number.

1221223023 is a deficient number, since it is larger than the sum of its proper divisors (568652337).

1221223023 is a wasteful number, since it uses less digits than its factorization.

1221223023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279 (or 5276 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1221223023 is about 34946.0015309334. The cubic root of 1221223023 is about 1068.8866700362.

Adding to 1221223023 its reverse (3203221221), we get a palindrome (4424444244).

The spelling of 1221223023 in words is "one billion, two hundred twenty-one million, two hundred twenty-three thousand, twenty-three".