321020131212 has 72 divisors (see below), whose sum is σ = 897363951120. Its totient is φ = 95946232320.

The previous prime is 321020131183. The next prime is 321020131331. The reversal of 321020131212 is 212131020123.

321020131212 is a `hidden beast` number, since 321 + 0 + 2 + 0 + 131 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5523537 + ... + 5581352.

It is an arithmetic number, because the mean of its divisors is an integer number (12463388210).

Almost surely, 2^321020131212 is an apocalyptic number.

It is an amenable number.

321020131212 is an abundant number, since it is smaller than the sum of its proper divisors (576343819908).

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

321020131212 is a wasteful number, since it uses less digits than its factorization.

321020131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11104983 (or 11104978 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 321020131212 its reverse (212131020123), we get a palindrome (533151151335).

The spelling of 321020131212 in words is "three hundred twenty-one billion, twenty million, one hundred thirty-one thousand, two hundred twelve".