11313221331031 has 4 divisors (see below), whose sum is σ = 11498683975864. Its totient is φ = 11127758686200.

The previous prime is 11313221331007. The next prime is 11313221331043. The reversal of 11313221331031 is 13013312231311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11313221331031 is a prime.

It is a super-2 number, since 2×11313221331031² (a number of 27 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 = 11313221330987 and 11313221331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11313221331001) 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, 92731322325 + ... + 92731322446.

It is an arithmetic number, because the mean of its divisors is an integer number (2874670993966).

Almost surely, 2^{11313221331031} is an apocalyptic number.

11313221331031 is a deficient number, since it is larger than the sum of its proper divisors (185462644833).

11313221331031 is an equidigital number, since it uses as much as digits as its factorization.

11313221331031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185462644832.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 11313221331031 its reverse (13013312231311), we get a palindrome (24326533562342).

The spelling of 11313221331031 in words is "eleven trillion, three hundred thirteen billion, two hundred twenty-one million, three hundred thirty-one thousand, thirty-one".