11231320013 has 4 divisors (see below), whose sum is σ = 11618606940. Its totient is φ = 10844033088.

The previous prime is 11231320007. The next prime is 11231320019. The reversal of 11231320013 is 31002313211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31002313211 = 17 ⋅1823665483.

It is an interprime number because it is at equal distance from previous prime (11231320007) and next prime (11231320019).

It can be written as a sum of positive squares in 2 ways, for example, as 6083688004 + 5147632009 = 77998^2 + 71747^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231320013 - 2¹² = 11231315917 is a prime.

It is a super-2 number, since 2×11231320013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11231319973 and 11231320000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231320019) 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, 193643420 + ... + 193643477.

It is an arithmetic number, because the mean of its divisors is an integer number (2904651735).

Almost surely, 2^11231320013 is an apocalyptic number.

It is an amenable number.

11231320013 is a deficient number, since it is larger than the sum of its proper divisors (387286927).

11231320013 is an equidigital number, since it uses as much as digits as its factorization.

11231320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387286926.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 11231320013 its reverse (31002313211), we get a palindrome (42233633224).

The spelling of 11231320013 in words is "eleven billion, two hundred thirty-one million, three hundred twenty thousand, thirteen".