1331223450312 has 128 divisors (see below), whose sum is σ = 3844452003840. Its totient is φ = 376257484800.

The previous prime is 1331223450289. The next prime is 1331223450341. The reversal of 1331223450312 is 2130543221331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331223450312.

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, 38294523 + ... + 38329269.

It is an arithmetic number, because the mean of its divisors is an integer number (30034781280).

Almost surely, 2^{1331223450312} is an apocalyptic number.

1331223450312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331223450312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1922226001920).

1331223450312 is an abundant number, since it is smaller than the sum of its proper divisors (2513228553528).

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

1331223450312 is a wasteful number, since it uses less digits than its factorization.

1331223450312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37211 (or 37207 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 1331223450312 its reverse (2130543221331), we get a palindrome (3461766671643).

The spelling of 1331223450312 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-three million, four hundred fifty thousand, three hundred twelve".