321023123421 has 96 divisors (see below), whose sum is σ = 593476835328. Its totient is φ = 149776024320.

The previous prime is 321023123417. The next prime is 321023123441. The reversal of 321023123421 is 124321320123.

It is not a de Polignac number, because 321023123421 - 2² = 321023123417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321023123391 and 321023123400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321023123441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1333320 + ... + 1555566.

It is an arithmetic number, because the mean of its divisors is an integer number (6182050368).

Almost surely, 2^321023123421 is an apocalyptic number.

It is an amenable number.

321023123421 is a deficient number, since it is larger than the sum of its proper divisors (272453711907).

321023123421 is a wasteful number, since it uses less digits than its factorization.

321023123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222331 (or 222318 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 321023123421 its reverse (124321320123), we get a palindrome (445344443544).

It can be divided in two parts, 321023 and 123421, that added together give a palindrome (444444).

The spelling of 321023123421 in words is "three hundred twenty-one billion, twenty-three million, one hundred twenty-three thousand, four hundred twenty-one".