1313221313420 has 24 divisors (see below), whose sum is σ = 2758669368000. Its totient is φ = 525116218752.

The previous prime is 1313221313419. The next prime is 1313221313429. The reversal of 1313221313420 is 243131223131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1313221313420.

It is not an unprimeable number, because it can be changed into a prime (1313221313429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10706660 + ... + 10828619.

It is an arithmetic number, because the mean of its divisors is an integer number (114944557000).

Almost surely, 2^{1313221313420} is an apocalyptic number.

1313221313420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313221313420 is an abundant number, since it is smaller than the sum of its proper divisors (1445448054580).

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

1313221313420 is a wasteful number, since it uses less digits than its factorization.

1313221313420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21538337 (or 21538335 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 1313221313420 its reverse (243131223131), we get a palindrome (1556352536551).

The spelling of 1313221313420 in words is "one trillion, three hundred thirteen billion, two hundred twenty-one million, three hundred thirteen thousand, four hundred twenty".