1312220213304 has 512 divisors, whose sum is σ = 4720064348160. Its totient is φ = 292536115200.

The previous prime is 1312220213299. The next prime is 1312220213323. The reversal of 1312220213304 is 4033120222131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 33878509 + ... + 33917219.

It is an arithmetic number, because the mean of its divisors is an integer number (9218875680).

Almost surely, 2^{1312220213304} is an apocalyptic number.

1312220213304 is a gapful number since it is divisible by the number (14) 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 1312220213304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2360032174080).

1312220213304 is an abundant number, since it is smaller than the sum of its proper divisors (3407844134856).

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

1312220213304 is a wasteful number, since it uses less digits than its factorization.

1312220213304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38851 (or 38847 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1312220213304 its reverse (4033120222131), we get a palindrome (5345340435435).

The spelling of 1312220213304 in words is "one trillion, three hundred twelve billion, two hundred twenty million, two hundred thirteen thousand, three hundred four".