321123020213 has 4 divisors (see below), whose sum is σ = 321124176288. Its totient is φ = 321121864140.

The previous prime is 321123020167. The next prime is 321123020219. The reversal of 321123020213 is 312020321123.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 321123020213 - 2¹⁴ = 321123003829 is a prime.

It is a super-2 number, since 2×321123020213² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321123020219) 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, 117968 + ... + 810038.

It is an arithmetic number, because the mean of its divisors is an integer number (80281044072).

Almost surely, 2^321123020213 is an apocalyptic number.

It is an amenable number.

321123020213 is a deficient number, since it is larger than the sum of its proper divisors (1156075).

321123020213 is an equidigital number, since it uses as much as digits as its factorization.

321123020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156074.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 321123020213 its reverse (312020321123), we get a palindrome (633143341336).

The spelling of 321123020213 in words is "three hundred twenty-one billion, one hundred twenty-three million, twenty thousand, two hundred thirteen".