123212321 has 8 divisors (see below), whose sum is σ = 133881600. Its totient is φ = 112961520.

The previous prime is 123212293. The next prime is 123212347.

123212321 is nontrivially palindromic in base 10.

123212321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 123212321 - 2²² = 119018017 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123212321.

It is not an unprimeable number, because it can be changed into a prime (123212351) 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, 104006 + ... + 105183.

It is an arithmetic number, because the mean of its divisors is an integer number (16735200).

Almost surely, 2^123212321 is an apocalyptic number.

It is an amenable number.

123212321 is a deficient number, since it is larger than the sum of its proper divisors (10669279).

123212321 is a wasteful number, since it uses less digits than its factorization.

123212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209239.

The product of its digits is 144, while the sum is 17.

The square root of 123212321 is about 11100.1045490572. The cubic root of 123212321 is about 497.6049740187.

The spelling of 123212321 in words is "one hundred twenty-three million, two hundred twelve thousand, three hundred twenty-one".