321220122132131 has 4 divisors (see below), whose sum is σ = 323749414432512. Its totient is φ = 318690829831752.

The previous prime is 321220122132109. The next prime is 321220122132149. The reversal of 321220122132131 is 131231221022123.

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

It is a cyclic number.

It is not a de Polignac number, because 321220122132131 - 2²⁶ = 321220055023267 is a prime.

It is a super-2 number, since 2×321220122132131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321220122132131.

It is not an unprimeable number, because it can be changed into a prime (321220122132031) 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 in 3 ways as a sum of consecutive naturals, for example, 1264646150000 + ... + 1264646150253.

It is an arithmetic number, because the mean of its divisors is an integer number (80937353608128).

Almost surely, 2^{321220122132131} is an apocalyptic number.

321220122132131 is a deficient number, since it is larger than the sum of its proper divisors (2529292300381).

321220122132131 is a wasteful number, since it uses less digits than its factorization.

321220122132131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529292300380.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 321220122132131 its reverse (131231221022123), we get a palindrome (452451343154254).

The spelling of 321220122132131 in words is "three hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one hundred thirty-two thousand, one hundred thirty-one".