1223111201999 has 4 divisors (see below), whose sum is σ = 1276289949936. Its totient is φ = 1169932454064.

The previous prime is 1223111201969. The next prime is 1223111202007. The reversal of 1223111201999 is 9991021113221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223111201999 - 2²⁸ = 1222842766543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223111201929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26589373934 + ... + 26589373979.

It is an arithmetic number, because the mean of its divisors is an integer number (319072487484).

Almost surely, 2^{1223111201999} is an apocalyptic number.

1223111201999 is a deficient number, since it is larger than the sum of its proper divisors (53178747937).

1223111201999 is an equidigital number, since it uses as much as digits as its factorization.

1223111201999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53178747936.

The product of its (nonzero) digits is 17496, while the sum is 41.

The spelling of 1223111201999 in words is "one trillion, two hundred twenty-three billion, one hundred eleven million, two hundred one thousand, nine hundred ninety-nine".