1223012203243 has 4 divisors (see below), whose sum is σ = 1223125466400. Its totient is φ = 1222898940088.

The previous prime is 1223012203207. The next prime is 1223012203331. The reversal of 1223012203243 is 3423022103221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223012203243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223012203643) 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, 56615380 + ... + 56636977.

It is an arithmetic number, because the mean of its divisors is an integer number (305781366600).

Almost surely, 2^{1223012203243} is an apocalyptic number.

1223012203243 is a deficient number, since it is larger than the sum of its proper divisors (113263157).

1223012203243 is a wasteful number, since it uses less digits than its factorization.

1223012203243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113263156.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 1223012203243 its reverse (3423022103221), we get a palindrome (4646034306464).

The spelling of 1223012203243 in words is "one trillion, two hundred twenty-three billion, twelve million, two hundred three thousand, two hundred forty-three".