1231320330212 has 96 divisors (see below), whose sum is σ = 2560886415360. Its totient is φ = 506919720960.

The previous prime is 1231320330197. The next prime is 1231320330241. The reversal of 1231320330212 is 2120330231321.

It is a super-2 number, since 2×1231320330212² (a number of 25 digits) contains 22 as substring.

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, 78225839 + ... + 78241577.

It is an arithmetic number, because the mean of its divisors is an integer number (26675900160).

Almost surely, 2^{1231320330212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231320330212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280443207680).

1231320330212 is an abundant number, since it is smaller than the sum of its proper divisors (1329566085148).

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

1231320330212 is a wasteful number, since it uses less digits than its factorization.

1231320330212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16441 (or 16439 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1231320330212 its reverse (2120330231321), we get a palindrome (3351650561533).

The spelling of 1231320330212 in words is "one trillion, two hundred thirty-one billion, three hundred twenty million, three hundred thirty thousand, two hundred twelve".