2311220331331 has 4 divisors (see below), whose sum is σ = 2313382372000. Its totient is φ = 2309058290664.

The previous prime is 2311220331271. The next prime is 2311220331361. The reversal of 2311220331331 is 1331330221132.

2311220331331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-2311220331331 is a prime.

It is a super-2 number, since 2×2311220331331² (a number of 26 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 = 2311220331296 and 2311220331305.

It is not an unprimeable number, because it can be changed into a prime (2311220331361) 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, 1081018731 + ... + 1081020868.

It is an arithmetic number, because the mean of its divisors is an integer number (578345593000).

Almost surely, 2^{2311220331331} is an apocalyptic number.

2311220331331 is a deficient number, since it is larger than the sum of its proper divisors (2162040669).

2311220331331 is a wasteful number, since it uses less digits than its factorization.

2311220331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162040668.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 2311220331331 its reverse (1331330221132), we get a palindrome (3642550552463).

The spelling of 2311220331331 in words is "two trillion, three hundred eleven billion, two hundred twenty million, three hundred thirty-one thousand, three hundred thirty-one".