531321111122111 has 8 divisors (see below), whose sum is σ = 568375039431360. Its totient is φ = 494911598957568.

The previous prime is 531321111122027. The next prime is 531321111122161. The reversal of 531321111122111 is 111221111123135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 531321111122111 - 2¹⁸ = 531321110859967 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 (531321111122161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161104034471 + ... + 161104037768.

It is an arithmetic number, because the mean of its divisors is an integer number (71046879928920).

Almost surely, 2^{531321111122111} is an apocalyptic number.

531321111122111 is a deficient number, since it is larger than the sum of its proper divisors (37053928309249).

531321111122111 is a wasteful number, since it uses less digits than its factorization.

531321111122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322208072353.

The product of its digits is 360, while the sum is 26.

Adding to 531321111122111 its reverse (111221111123135), we get a palindrome (642542222245246).

The spelling of 531321111122111 in words is "five hundred thirty-one trillion, three hundred twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, one hundred eleven".