321112130021 has 4 divisors (see below), whose sum is σ = 321188029344. Its totient is φ = 321036230700.

The previous prime is 321112129997. The next prime is 321112130069. The reversal of 321112130021 is 120031211123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120031211123 = 4691 ⋅25587553.

It is a cyclic number.

It is not a de Polignac number, because 321112130021 - 2¹⁸ = 321111867877 is a prime.

It is a super-2 number, since 2×321112130021² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321112130221) 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, 37943315 + ... + 37951776.

It is an arithmetic number, because the mean of its divisors is an integer number (80297007336).

Almost surely, 2^321112130021 is an apocalyptic number.

It is an amenable number.

321112130021 is a deficient number, since it is larger than the sum of its proper divisors (75899323).

321112130021 is an equidigital number, since it uses as much as digits as its factorization.

321112130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75899322.

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

Adding to 321112130021 its reverse (120031211123), we get a palindrome (441143341144).

The spelling of 321112130021 in words is "three hundred twenty-one billion, one hundred twelve million, one hundred thirty thousand, twenty-one".