312321143212 has 24 divisors (see below), whose sum is σ = 588630119616. Its totient is φ = 144142124928.

The previous prime is 312321143107. The next prime is 312321143213. The reversal of 312321143212 is 212341123213.

It is a super-2 number, since 2×312321143212² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312321143213) 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, 1258653 + ... + 1486219.

It is an arithmetic number, because the mean of its divisors is an integer number (24526254984).

Almost surely, 2^312321143212 is an apocalyptic number.

It is an amenable number.

312321143212 is a deficient number, since it is larger than the sum of its proper divisors (276308976404).

312321143212 is a wasteful number, since it uses less digits than its factorization.

312321143212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253977 (or 253975 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 312321143212 its reverse (212341123213), we get a palindrome (524662266425).

The spelling of 312321143212 in words is "three hundred twelve billion, three hundred twenty-one million, one hundred forty-three thousand, two hundred twelve".