321121123 has 4 divisors (see below), whose sum is σ = 321474528. Its totient is φ = 320767720.

The previous prime is 321121103. The next prime is 321121139.

321121123 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321121123 - 2⁵ = 321121091 is a prime.

It is a super-2 number, since 2×321121123² = 206237551273562258, 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 = 321121097 and 321121106.

It is not an unprimeable number, because it can be changed into a prime (321121103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175336 + ... + 177157.

It is an arithmetic number, because the mean of its divisors is an integer number (80368632).

Almost surely, 2^321121123 is an apocalyptic number.

321121123 is a deficient number, since it is larger than the sum of its proper divisors (353405).

321121123 is an equidigital number, since it uses as much as digits as its factorization.

321121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353404.

The product of its digits is 72, while the sum is 16.

The square root of 321121123 is about 17919.8527616719. The cubic root of 321121123 is about 684.7882365287.

The spelling of 321121123 in words is "three hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-three".