321421101100051 has 2 divisors, whose sum is σ = 321421101100052. Its totient is φ = 321421101100050.

The previous prime is 321421101100049. The next prime is 321421101100079. The reversal of 321421101100051 is 150001101124123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321421101100051 - 2¹ = 321421101100049 is a prime.

Together with 321421101100049, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 321421101099995 and 321421101100031.

It is not a weakly prime, because it can be changed into another prime (321421101100751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160710550550025 + 160710550550026.

It is an arithmetic number, because the mean of its divisors is an integer number (160710550550026).

Almost surely, 2^{321421101100051} is an apocalyptic number.

321421101100051 is a deficient number, since it is larger than the sum of its proper divisors (1).

321421101100051 is an equidigital number, since it uses as much as digits as its factorization.

321421101100051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 321421101100051 its reverse (150001101124123), we get a palindrome (471422202224174).

The spelling of 321421101100051 in words is "three hundred twenty-one trillion, four hundred twenty-one billion, one hundred one million, one hundred thousand, fifty-one".