1221000323 has 2 divisors, whose sum is σ = 1221000324. Its totient is φ = 1221000322.

The previous prime is 1221000283. The next prime is 1221000329. The reversal of 1221000323 is 3230001221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221000323 - 2³⁰ = 147258499 is a prime.

It is a super-2 number, since 2×1221000323² = 2981683577532208658, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1221000298 and 1221000307.

It is not a weakly prime, because it can be changed into another prime (1221000329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610500161 + 610500162.

It is an arithmetic number, because the mean of its divisors is an integer number (610500162).

Almost surely, 2^1221000323 is an apocalyptic number.

1221000323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221000323 is an equidigital number, since it uses as much as digits as its factorization.

1221000323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1221000323 is about 34942.8150411497. The cubic root of 1221000323 is about 1068.8216926794.

Adding to 1221000323 its reverse (3230001221), we get a palindrome (4451001544).

The spelling of 1221000323 in words is "one billion, two hundred twenty-one million, three hundred twenty-three", and thus it is an aban number.