321320520101 has 16 divisors (see below), whose sum is σ = 368676489984. Its totient is φ = 274328135424.

The previous prime is 321320520091. The next prime is 321320520113. The reversal of 321320520101 is 101025023123.

It is not a de Polignac number, because 321320520101 - 2³⁴ = 304140650917 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 (321320520161) 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, 20230175 + ... + 20246051.

It is an arithmetic number, because the mean of its divisors is an integer number (23042280624).

Almost surely, 2^321320520101 is an apocalyptic number.

It is an amenable number.

321320520101 is a deficient number, since it is larger than the sum of its proper divisors (47355969883).

321320520101 is a wasteful number, since it uses less digits than its factorization.

321320520101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27140.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 321320520101 its reverse (101025023123), we get a palindrome (422345543224).

The spelling of 321320520101 in words is "three hundred twenty-one billion, three hundred twenty million, five hundred twenty thousand, one hundred one".