321012310120421 has 4 divisors (see below), whose sum is σ = 329688318502092. Its totient is φ = 312336301738752.

The previous prime is 321012310120409. The next prime is 321012310120423. The reversal of 321012310120421 is 124021013210123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 214357739003521 + 106654571116900 = 14640961^2 + 10327370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321012310120421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321012310120423) 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, 4338004190780 + ... + 4338004190853.

It is an arithmetic number, because the mean of its divisors is an integer number (82422079625523).

Almost surely, 2^{321012310120421} is an apocalyptic number.

It is an amenable number.

321012310120421 is a deficient number, since it is larger than the sum of its proper divisors (8676008381671).

321012310120421 is an equidigital number, since it uses as much as digits as its factorization.

321012310120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8676008381670.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 321012310120421 its reverse (124021013210123), we get a palindrome (445033323330544).

The spelling of 321012310120421 in words is "three hundred twenty-one trillion, twelve billion, three hundred ten million, one hundred twenty thousand, four hundred twenty-one".