321231221130 has 64 divisors (see below), whose sum is σ = 773124341760. Its totient is φ = 85420835136.

The previous prime is 321231221123. The next prime is 321231221147. The reversal of 321231221130 is 31122132123.

It is a junction number, because it is equal to n+sod(n) for n = 321231221097 and 321231221106.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28474831 + ... + 28486109.

It is an arithmetic number, because the mean of its divisors is an integer number (12080067840).

Almost surely, 2^321231221130 is an apocalyptic number.

321231221130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

321231221130 is an abundant number, since it is smaller than the sum of its proper divisors (451893120630).

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

321231221130 is a wasteful number, since it uses less digits than its factorization.

321231221130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13875.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 321231221130 its reverse (31122132123), we get a palindrome (352353353253).

It can be divided in two parts, 321231 and 221130, that added together give a triangular number (542361 = T₁₀₄₁).

The spelling of 321231221130 in words is "three hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-one thousand, one hundred thirty".