531120413143221 has 16 divisors (see below), whose sum is σ = 773613245629440. Its totient is φ = 321443466615920.

The previous prime is 531120413143171. The next prime is 531120413143241. The reversal of 531120413143221 is 122341314021135.

It is not a de Polignac number, because 531120413143221 - 2³⁴ = 531103233274037 is a prime.

It is a super-2 number, since 2×531120413143221² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531120413143241) 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, 11192297535 + ... + 11192344988.

It is an arithmetic number, because the mean of its divisors is an integer number (48350827851840).

Almost surely, 2^{531120413143221} is an apocalyptic number.

It is an amenable number.

531120413143221 is a deficient number, since it is larger than the sum of its proper divisors (242492832486219).

531120413143221 is a wasteful number, since it uses less digits than its factorization.

531120413143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22384643256.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 531120413143221 its reverse (122341314021135), we get a palindrome (653461727164356).

The spelling of 531120413143221 in words is "five hundred thirty-one trillion, one hundred twenty billion, four hundred thirteen million, one hundred forty-three thousand, two hundred twenty-one".