531221213422132 has 24 divisors (see below), whose sum is σ = 943566797423264. Its totient is φ = 261631157797152.

The previous prime is 531221213422073. The next prime is 531221213422139. The reversal of 531221213422132 is 231224312122135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531221213422139) 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, 52590918 + ... + 61872829.

Almost surely, 2^{531221213422132} is an apocalyptic number.

It is an amenable number.

531221213422132 is a deficient number, since it is larger than the sum of its proper divisors (412345584001132).

531221213422132 is a wasteful number, since it uses less digits than its factorization.

531221213422132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114481135 (or 114481133 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

Adding to 531221213422132 its reverse (231224312122135), we get a palindrome (762445525544267).

The spelling of 531221213422132 in words is "five hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirteen million, four hundred twenty-two thousand, one hundred thirty-two".