2311312330121 has 4 divisors (see below), whose sum is σ = 2331766421652. Its totient is φ = 2290858238592.

The previous prime is 2311312330073. The next prime is 2311312330169. The reversal of 2311312330121 is 1210332131132.

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

It is an interprime number because it is at equal distance from previous prime (2311312330073) and next prime (2311312330169).

It can be written as a sum of positive squares in 2 ways, for example, as 527858918521 + 1783453411600 = 726539^2 + 1335460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2311312330121 is a prime.

It is a super-3 number, since 3×2311312330121³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2311312330021) 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, 10227045596 + ... + 10227045821.

It is an arithmetic number, because the mean of its divisors is an integer number (582941605413).

Almost surely, 2^{2311312330121} is an apocalyptic number.

It is an amenable number.

2311312330121 is a deficient number, since it is larger than the sum of its proper divisors (20454091531).

2311312330121 is a wasteful number, since it uses less digits than its factorization.

2311312330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20454091530.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2311312330121 its reverse (1210332131132), we get a palindrome (3521644461253).

The spelling of 2311312330121 in words is "two trillion, three hundred eleven billion, three hundred twelve million, three hundred thirty thousand, one hundred twenty-one".