13434431221220 has 24 divisors (see below), whose sum is σ = 28471134060600. Its totient is φ = 5324471822592.

The previous prime is 13434431221219. The next prime is 13434431221229. The reversal of 13434431221220 is 2212213443431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64980127744 + 13369451093476 = 254912^2 + 3656426^2 .

It is not an unprimeable number, because it can be changed into a prime (13434431221229) 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, 3081289385 + ... + 3081293744.

It is an arithmetic number, because the mean of its divisors is an integer number (1186297252525).

Almost surely, 2^{13434431221220} is an apocalyptic number.

13434431221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13434431221220 is an abundant number, since it is smaller than the sum of its proper divisors (15036702839380).

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

13434431221220 is a wasteful number, since it uses less digits than its factorization.

13434431221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162583247 (or 6162583245 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 13434431221220 its reverse (2212213443431), we get a palindrome (15646644664651).

The spelling of 13434431221220 in words is "thirteen trillion, four hundred thirty-four billion, four hundred thirty-one million, two hundred twenty-one thousand, two hundred twenty".