1223012203123 has 4 divisors (see below), whose sum is σ = 1223142030208. Its totient is φ = 1222882376040.

The previous prime is 1223012203121. The next prime is 1223012203129. The reversal of 1223012203123 is 3213022103221.

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 1223012203123 - 2¹ = 1223012203121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223012203094 and 1223012203103.

It is not an unprimeable number, because it can be changed into a prime (1223012203121) 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, 64899411 + ... + 64918252.

It is an arithmetic number, because the mean of its divisors is an integer number (305785507552).

Almost surely, 2^{1223012203123} is an apocalyptic number.

1223012203123 is a deficient number, since it is larger than the sum of its proper divisors (129827085).

1223012203123 is an equidigital number, since it uses as much as digits as its factorization.

1223012203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129827084.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1223012203123 its reverse (3213022103221), we get a palindrome (4436034306344).

The spelling of 1223012203123 in words is "one trillion, two hundred twenty-three billion, twelve million, two hundred three thousand, one hundred twenty-three".