123322021 has 4 divisors (see below), whose sum is σ = 128683872. Its totient is φ = 117960172.

The previous prime is 123321983. The next prime is 123322033. The reversal of 123322021 is 120223321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123322021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123321986 and 123322004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123328021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2680891 + ... + 2680936.

It is an arithmetic number, because the mean of its divisors is an integer number (32170968).

Almost surely, 2^123322021 is an apocalyptic number.

It is an amenable number.

123322021 is a deficient number, since it is larger than the sum of its proper divisors (5361851).

123322021 is an equidigital number, since it uses as much as digits as its factorization.

123322021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361850.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123322021 is about 11105.0448445740. The cubic root of 123322021 is about 497.7526082622.

Adding to 123322021 its reverse (120223321), we get a palindrome (243545342).

The spelling of 123322021 in words is "one hundred twenty-three million, three hundred twenty-two thousand, twenty-one".