123111361 has 8 divisors (see below), whose sum is σ = 126665504. Its totient is φ = 119607840.

The previous prime is 123111337. The next prime is 123111379. The reversal of 123111361 is 163111321.

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

It is a cyclic number.

It is not a de Polignac number, because 123111361 - 2²¹ = 121014209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123111301) 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, 7695 + ... + 17476.

It is an arithmetic number, because the mean of its divisors is an integer number (15833188).

Almost surely, 2^123111361 is an apocalyptic number.

It is an amenable number.

123111361 is a deficient number, since it is larger than the sum of its proper divisors (3554143).

123111361 is an equidigital number, since it uses as much as digits as its factorization.

123111361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25311.

The product of its digits is 108, while the sum is 19.

The square root of 123111361 is about 11095.5559121659. Note that the first 3 decimals coincide. The cubic root of 123111361 is about 497.4690246112.

Adding to 123111361 its reverse (163111321), we get a palindrome (286222682).

The spelling of 123111361 in words is "one hundred twenty-three million, one hundred eleven thousand, three hundred sixty-one".