123111302331 has 32 divisors (see below), whose sum is σ = 171299036160. Its totient is φ = 78579820800.

The previous prime is 123111302311. The next prime is 123111302357. The reversal of 123111302331 is 133203111321.

It is a happy number.

It is not a de Polignac number, because 123111302331 - 2⁶ = 123111302267 is a prime.

It is a super-2 number, since 2×123111302331² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123111302298 and 123111302307.

It is not an unprimeable number, because it can be changed into a prime (123111302311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3305310 + ... + 3342348.

It is an arithmetic number, because the mean of its divisors is an integer number (5353094880).

Almost surely, 2^123111302331 is an apocalyptic number.

123111302331 is a deficient number, since it is larger than the sum of its proper divisors (48187733829).

123111302331 is a wasteful number, since it uses less digits than its factorization.

123111302331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37587.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123111302331 its reverse (133203111321), we get a palindrome (256314413652).

The spelling of 123111302331 in words is "one hundred twenty-three billion, one hundred eleven million, three hundred two thousand, three hundred thirty-one".