1321210013312 has 32 divisors (see below), whose sum is σ = 3008112085920. Its totient is φ = 566232862464.

The previous prime is 1321210013293. The next prime is 1321210013317. The reversal of 1321210013312 is 2133100121231.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1321210013317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 737281478 + ... + 737283269.

It is an arithmetic number, because the mean of its divisors is an integer number (94003502685).

Almost surely, 2^{1321210013312} is an apocalyptic number.

It is an amenable number.

1321210013312 is an abundant number, since it is smaller than the sum of its proper divisors (1686902072608).

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

1321210013312 is an equidigital number, since it uses as much as digits as its factorization.

1321210013312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474564768 (or 1474564756 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321210013312 its reverse (2133100121231), we get a palindrome (3454310134543).

The spelling of 1321210013312 in words is "one trillion, three hundred twenty-one billion, two hundred ten million, thirteen thousand, three hundred twelve".