312121330132 has 48 divisors (see below), whose sum is σ = 578350080000. Its totient is φ = 146977425504.

The previous prime is 312121330121. The next prime is 312121330187. The reversal of 312121330132 is 231033121213.

It is a super-2 number, since 2×312121330132² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10865893 + ... + 10894579.

It is an arithmetic number, because the mean of its divisors is an integer number (12048960000).

Almost surely, 2^312121330132 is an apocalyptic number.

It is an amenable number.

312121330132 is a deficient number, since it is larger than the sum of its proper divisors (266228749868).

312121330132 is a wasteful number, since it uses less digits than its factorization.

312121330132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29548 (or 29546 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 312121330132 its reverse (231033121213), we get a palindrome (543154451345).

The spelling of 312121330132 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred thirty thousand, one hundred thirty-two".