123181321 has 8 divisors (see below), whose sum is σ = 129312000. Its totient is φ = 117185520.

The previous prime is 123181301. The next prime is 123181339.

It is a happy number.

123181321 is nontrivially palindromic in base 10.

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 123181321 - 2⁷ = 123181193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123181292 and 123181301.

It is not an unprimeable number, because it can be changed into a prime (123181301) 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, 31846 + ... + 35503.

It is an arithmetic number, because the mean of its divisors is an integer number (16164000).

Almost surely, 2^123181321 is an apocalyptic number.

It is an amenable number.

123181321 is a deficient number, since it is larger than the sum of its proper divisors (6130679).

123181321 is an equidigital number, since it uses as much as digits as its factorization.

123181321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67439.

The product of its digits is 288, while the sum is 22.

The square root of 123181321 is about 11098.7080779702. The cubic root of 123181321 is about 497.5632383440.

The spelling of 123181321 in words is "one hundred twenty-three million, one hundred eighty-one thousand, three hundred twenty-one".