311121001313 has 4 divisors (see below), whose sum is σ = 311235009540. Its totient is φ = 311006993088.

The previous prime is 311121001267. The next prime is 311121001319. The reversal of 311121001313 is 313100121113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 180823104289 + 130297897024 = 425233^2 + 360968^2 .

It is a cyclic number.

It is not a de Polignac number, because 311121001313 - 2⁶ = 311121001249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311121001291 and 311121001300.

It is not an unprimeable number, because it can be changed into a prime (311121001319) 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, 57000020 + ... + 57005477.

It is an arithmetic number, because the mean of its divisors is an integer number (77808752385).

Almost surely, 2^311121001313 is an apocalyptic number.

It is an amenable number.

311121001313 is a deficient number, since it is larger than the sum of its proper divisors (114008227).

311121001313 is a wasteful number, since it uses less digits than its factorization.

311121001313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114008226.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 311121001313 its reverse (313100121113), we get a palindrome (624221122426).

The spelling of 311121001313 in words is "three hundred eleven billion, one hundred twenty-one million, one thousand, three hundred thirteen".