1223000001 has 6 divisors (see below), whose sum is σ = 1766555570. Its totient is φ = 815333328.

The previous prime is 1222999957. The next prime is 1223000021. The reversal of 1223000001 is 1000003221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 862949376 + 360050625 = 29376^2 + 18975^2 .

It is not a de Polignac number, because 1223000001 - 2¹⁰ = 1222998977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 135888889 = 1223000001 / (1 + 2 + 2 + 3 + 0 + 0 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67944436 + ... + 67944453.

Almost surely, 2^1223000001 is an apocalyptic number.

It is an amenable number.

1223000001 is a deficient number, since it is larger than the sum of its proper divisors (543555569).

1223000001 is a wasteful number, since it uses less digits than its factorization.

1223000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135888895 (or 135888892 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1223000001 is about 34971.4169143888. The cubic root of 1223000001 is about 1069.4048575556.

Adding to 1223000001 its reverse (1000003221), we get a palindrome (2223003222).

The spelling of 1223000001 in words is "one billion, two hundred twenty-three million, one", and thus it is an aban number.