321113201021 has 4 divisors (see below), whose sum is σ = 321155610972. Its totient is φ = 321070791072.

The previous prime is 321113201009. The next prime is 321113201033. The reversal of 321113201021 is 120102311123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120102311123 = 56101 ⋅2140823.

It is an interprime number because it is at equal distance from previous prime (321113201009) and next prime (321113201033).

It can be written as a sum of positive squares in 2 ways, for example, as 276923275225 + 44189925796 = 526235^2 + 210214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321113201021 is a prime.

It is a super-3 number, since 3×321113201021³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321113201921) 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, 21193616 + ... + 21208761.

It is an arithmetic number, because the mean of its divisors is an integer number (80288902743).

Almost surely, 2^321113201021 is an apocalyptic number.

It is an amenable number.

321113201021 is a deficient number, since it is larger than the sum of its proper divisors (42409951).

321113201021 is an equidigital number, since it uses as much as digits as its factorization.

321113201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42409950.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321113201021 its reverse (120102311123), we get a palindrome (441215512144).

The spelling of 321113201021 in words is "three hundred twenty-one billion, one hundred thirteen million, two hundred one thousand, twenty-one".