1223031312013 has 4 divisors (see below), whose sum is σ = 1397750070880. Its totient is φ = 1048312553148.

The previous prime is 1223031311987. The next prime is 1223031312037. The reversal of 1223031312013 is 3102131303221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1223031312013 - 2¹⁷ = 1223031180941 is a prime.

It is a super-2 number, since 2×1223031312013² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223031312073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87359379423 + ... + 87359379436.

It is an arithmetic number, because the mean of its divisors is an integer number (349437517720).

Almost surely, 2^{1223031312013} is an apocalyptic number.

It is an amenable number.

1223031312013 is a deficient number, since it is larger than the sum of its proper divisors (174718758867).

1223031312013 is an equidigital number, since it uses as much as digits as its factorization.

1223031312013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174718758866.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1223031312013 its reverse (3102131303221), we get a palindrome (4325162615234).

The spelling of 1223031312013 in words is "one trillion, two hundred twenty-three billion, thirty-one million, three hundred twelve thousand, thirteen".