1223205023 has 2 divisors, whose sum is σ = 1223205024. Its totient is φ = 1223205022.

The previous prime is 1223204951. The next prime is 1223205079. The reversal of 1223205023 is 3205023221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223205023 - 2¹⁸ = 1222942879 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223204986 and 1223205004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223205623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611602511 + 611602512.

It is an arithmetic number, because the mean of its divisors is an integer number (611602512).

Almost surely, 2^1223205023 is an apocalyptic number.

1223205023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223205023 is an equidigital number, since it uses as much as digits as its factorization.

1223205023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 1223205023 is about 34974.3480711221. The cubic root of 1223205023 is about 1069.4646120588.

Adding to 1223205023 its reverse (3205023221), we get a palindrome (4428228244).

The spelling of 1223205023 in words is "one billion, two hundred twenty-three million, two hundred five thousand, twenty-three".