321131543011 has 2 divisors, whose sum is σ = 321131543012. Its totient is φ = 321131543010.

The previous prime is 321131542997. The next prime is 321131543063. The reversal of 321131543011 is 110345131123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321131543011 - 2¹¹ = 321131540963 is a prime.

It is a super-2 number, since 2×321131543011² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321131543071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160565771505 + 160565771506.

It is an arithmetic number, because the mean of its divisors is an integer number (160565771506).

Almost surely, 2^321131543011 is an apocalyptic number.

321131543011 is a deficient number, since it is larger than the sum of its proper divisors (1).

321131543011 is an equidigital number, since it uses as much as digits as its factorization.

321131543011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 321131543011 its reverse (110345131123), we get a palindrome (431476674134).

The spelling of 321131543011 in words is "three hundred twenty-one billion, one hundred thirty-one million, five hundred forty-three thousand, eleven".