321221232112131 has 48 divisors (see below), whose sum is σ = 508318596624384. Its totient is φ = 194285230921152.

The previous prime is 321221232112049. The next prime is 321221232112147. The reversal of 321221232112131 is 131211232122123.

321221232112131 is a `hidden beast` number, since 3 + 2 + 1 + 2 + 212 + 321 + 121 + 3 + 1 = 666.

It is not a de Polignac number, because 321221232112131 - 2⁷ = 321221232112003 is a prime.

It is a super-2 number, since 2×321221232112131² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321221232112095 and 321221232112104.

It is not an unprimeable number, because it can be changed into a prime (321221232112171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 99428581 + ... + 102608406.

It is an arithmetic number, because the mean of its divisors is an integer number (10589970763008).

Almost surely, 2^{321221232112131} is an apocalyptic number.

321221232112131 is a deficient number, since it is larger than the sum of its proper divisors (187097364512253).

321221232112131 is a wasteful number, since it uses less digits than its factorization.

321221232112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202037240 (or 202037237 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 321221232112131 its reverse (131211232122123), we get a palindrome (452432464234254).

The spelling of 321221232112131 in words is "three hundred twenty-one trillion, two hundred twenty-one billion, two hundred thirty-two million, one hundred twelve thousand, one hundred thirty-one".