12312201023 has 4 divisors (see below), whose sum is σ = 13036448160. Its totient is φ = 11587953888.

The previous prime is 12312200959. The next prime is 12312201061. The reversal of 12312201023 is 32010221321.

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 12312201023 - 2⁶ = 12312200959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 724247119 = 12312201023 / (1 + 2 + 3 + 1 + 2 + 2 + 0 + 1 + 0 + 2 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312200992 and 12312201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312201073) 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, 362123543 + ... + 362123576.

It is an arithmetic number, because the mean of its divisors is an integer number (3259112040).

Almost surely, 2^12312201023 is an apocalyptic number.

12312201023 is a deficient number, since it is larger than the sum of its proper divisors (724247137).

12312201023 is an equidigital number, since it uses as much as digits as its factorization.

12312201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724247136.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12312201023 its reverse (32010221321), we get a palindrome (44322422344).

The spelling of 12312201023 in words is "twelve billion, three hundred twelve million, two hundred one thousand, twenty-three".