1321230131412 has 48 divisors (see below), whose sum is σ = 3171533339520. Its totient is φ = 427905249408.

The previous prime is 1321230131357. The next prime is 1321230131447. The reversal of 1321230131412 is 2141310321231.

It is a super-2 number, since 2×1321230131412² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10018987 + ... + 10150002.

It is an arithmetic number, because the mean of its divisors is an integer number (66073611240).

Almost surely, 2^{1321230131412} is an apocalyptic number.

1321230131412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321230131412 is an abundant number, since it is smaller than the sum of its proper divisors (1850303208108).

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

1321230131412 is a wasteful number, since it uses less digits than its factorization.

1321230131412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20169152 (or 20169150 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 1321230131412 its reverse (2141310321231), we get a palindrome (3462540452643).

The spelling of 1321230131412 in words is "one trillion, three hundred twenty-one billion, two hundred thirty million, one hundred thirty-one thousand, four hundred twelve".