123611331 has 8 divisors (see below), whose sum is σ = 164868880. Its totient is φ = 82380672.

The previous prime is 123611329. The next prime is 123611333. The reversal of 123611331 is 133116321.

It is an interprime number because it is at equal distance from previous prime (123611329) and next prime (123611333).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123611331 - 2¹ = 123611329 is a prime.

It is a super-2 number, since 2×123611331² = 30559522303183122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123611298 and 123611307.

It is not an unprimeable number, because it can be changed into a prime (123611333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9831 + ... + 18543.

It is an arithmetic number, because the mean of its divisors is an integer number (20608610).

Almost surely, 2^123611331 is an apocalyptic number.

123611331 is a deficient number, since it is larger than the sum of its proper divisors (41257549).

123611331 is an equidigital number, since it uses as much as digits as its factorization.

123611331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13445.

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

The square root of 123611331 is about 11118.0632755890. The cubic root of 123611331 is about 498.1415421607.

Adding to 123611331 its reverse (133116321), we get a palindrome (256727652).

The spelling of 123611331 in words is "one hundred twenty-three million, six hundred eleven thousand, three hundred thirty-one".