321121001023 has 4 divisors (see below), whose sum is σ = 338022106360. Its totient is φ = 304219895688.

The previous prime is 321121000979. The next prime is 321121001041. The reversal of 321121001023 is 320100121123.

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 321121001023 - 2³³ = 312531066431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321121000988 and 321121001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321121001083) 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, 8450552640 + ... + 8450552677.

It is an arithmetic number, because the mean of its divisors is an integer number (84505526590).

Almost surely, 2^321121001023 is an apocalyptic number.

321121001023 is a deficient number, since it is larger than the sum of its proper divisors (16901105337).

321121001023 is a wasteful number, since it uses less digits than its factorization.

321121001023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16901105336.

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

Adding to 321121001023 its reverse (320100121123), we get a palindrome (641221122146).

The spelling of 321121001023 in words is "three hundred twenty-one billion, one hundred twenty-one million, one thousand, twenty-three".