321120310021 has 16 divisors (see below), whose sum is σ = 373289788800. Its totient is φ = 270526491648.

The previous prime is 321120310009. The next prime is 321120310033. The reversal of 321120310021 is 120013021123.

It is an interprime number because it is at equal distance from previous prime (321120310009) and next prime (321120310033).

It is not a de Polignac number, because 321120310021 - 2¹⁷ = 321120178949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321120309977 and 321120310004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321120310921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2052745 + ... + 2203633.

It is an arithmetic number, because the mean of its divisors is an integer number (23330611800).

Almost surely, 2^321120310021 is an apocalyptic number.

It is an amenable number.

321120310021 is a deficient number, since it is larger than the sum of its proper divisors (52169478779).

321120310021 is a wasteful number, since it uses less digits than its factorization.

321120310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156108.

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

Adding to 321120310021 its reverse (120013021123), we get a palindrome (441133331144).

The spelling of 321120310021 in words is "three hundred twenty-one billion, one hundred twenty million, three hundred ten thousand, twenty-one".