1223202011423 has 4 divisors (see below), whose sum is σ = 1397945155920. Its totient is φ = 1048458866928.

The previous prime is 1223202011419. The next prime is 1223202011429. The reversal of 1223202011423 is 3241102023221.

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 1223202011423 - 2² = 1223202011419 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 (1223202011429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87371572238 + ... + 87371572251.

It is an arithmetic number, because the mean of its divisors is an integer number (349486288980).

Almost surely, 2^{1223202011423} is an apocalyptic number.

1223202011423 is a deficient number, since it is larger than the sum of its proper divisors (174743144497).

1223202011423 is an equidigital number, since it uses as much as digits as its factorization.

1223202011423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174743144496.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1223202011423 its reverse (3241102023221), we get a palindrome (4464304034644).

The spelling of 1223202011423 in words is "one trillion, two hundred twenty-three billion, two hundred two million, eleven thousand, four hundred twenty-three".