1213320400404 has 96 divisors (see below), whose sum is σ = 3292941367296. Its totient is φ = 340546066560.

The previous prime is 1213320400367. The next prime is 1213320400423. The reversal of 1213320400404 is 4040040233121.

It is a congruent number.

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, 1284807 + ... + 2019249.

It is an arithmetic number, because the mean of its divisors is an integer number (34301472576).

Almost surely, 2^{1213320400404} is an apocalyptic number.

1213320400404 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 1213320400404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1646470683648).

1213320400404 is an abundant number, since it is smaller than the sum of its proper divisors (2079620966892).

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

1213320400404 is a wasteful number, since it uses less digits than its factorization.

1213320400404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734805 (or 734803 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1213320400404 its reverse (4040040233121), we get a palindrome (5253360633525).

The spelling of 1213320400404 in words is "one trillion, two hundred thirteen billion, three hundred twenty million, four hundred thousand, four hundred four".