531221213422130 has 512 divisors, whose sum is σ = 1329959130882048. Its totient is φ = 147743601868800.

The previous prime is 531221213422073. The next prime is 531221213422139. The reversal of 531221213422130 is 31224312122135.

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 255 ways as a sum of consecutive naturals, for example, 3161137889 + ... + 3161305931.

It is an arithmetic number, because the mean of its divisors is an integer number (2597576427504).

Almost surely, 2^{531221213422130} is an apocalyptic number.

531221213422130 is an abundant number, since it is smaller than the sum of its proper divisors (798737917459918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531221213422130 is a wasteful number, since it uses less digits than its factorization.

531221213422130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168290.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 531221213422130 its reverse (31224312122135), we get a palindrome (562445525544265).

The spelling of 531221213422130 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".