11231120013 has 4 divisors (see below), whose sum is σ = 14974826688. Its totient is φ = 7487413340.

The previous prime is 11231120009. The next prime is 11231120081. The reversal of 11231120013 is 31002113211.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 11231120013 - 2² = 11231120009 is a prime.

It is a super-3 number, since 3×11231120013³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 11231119974 and 11231120001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231120003) 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, 1871853333 + ... + 1871853338.

It is an arithmetic number, because the mean of its divisors is an integer number (3743706672).

Almost surely, 2^11231120013 is an apocalyptic number.

It is an amenable number.

11231120013 is a deficient number, since it is larger than the sum of its proper divisors (3743706675).

11231120013 is an equidigital number, since it uses as much as digits as its factorization.

11231120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3743706674.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11231120013 its reverse (31002113211), we get a palindrome (42233233224).

The spelling of 11231120013 in words is "eleven billion, two hundred thirty-one million, one hundred twenty thousand, thirteen".