123311320331 has 4 divisors (see below), whose sum is σ = 124872223200. Its totient is φ = 121750417464.

The previous prime is 123311320313. The next prime is 123311320351. The reversal of 123311320331 is 133023113321.

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

It is a cyclic number.

It is not a de Polignac number, because 123311320331 - 2⁶ = 123311320267 is a prime.

It is a super-2 number, since 2×123311320331² (a number of 23 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 = 123311320297 and 123311320306.

It is not an unprimeable number, because it can be changed into a prime (123311320351) 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, 780451316 + ... + 780451473.

It is an arithmetic number, because the mean of its divisors is an integer number (31218055800).

Almost surely, 2^123311320331 is an apocalyptic number.

123311320331 is a deficient number, since it is larger than the sum of its proper divisors (1560902869).

123311320331 is an equidigital number, since it uses as much as digits as its factorization.

123311320331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560902868.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 123311320331 its reverse (133023113321), we get a palindrome (256334433652).

The spelling of 123311320331 in words is "one hundred twenty-three billion, three hundred eleven million, three hundred twenty thousand, three hundred thirty-one".