321020020123 has 4 divisors (see below), whose sum is σ = 350203658328. Its totient is φ = 291836381920.

The previous prime is 321020020099. The next prime is 321020020133.

321020020123 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 321020020123 - 2²¹ = 321017922971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321020020097 and 321020020106.

It is not an unprimeable number, because it can be changed into a prime (321020020133) 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, 14591819086 + ... + 14591819107.

It is an arithmetic number, because the mean of its divisors is an integer number (87550914582).

Almost surely, 2^321020020123 is an apocalyptic number.

321020020123 is a deficient number, since it is larger than the sum of its proper divisors (29183638205).

321020020123 is a wasteful number, since it uses less digits than its factorization.

321020020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29183638204.

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

It can be divided in two parts, 3210200 and 20123, that added together give a palindrome (3230323).

The spelling of 321020020123 in words is "three hundred twenty-one billion, twenty million, twenty thousand, one hundred twenty-three".