13021431220 has 48 divisors (see below), whose sum is σ = 31263418368. Its totient is φ = 4462778880.

The previous prime is 13021431187. The next prime is 13021431221. The reversal of 13021431220 is 2213412031.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021431221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380205 + ... + 413035.

It is an arithmetic number, because the mean of its divisors is an integer number (651321216).

Almost surely, 2^13021431220 is an apocalyptic number.

13021431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021431220 is an abundant number, since it is smaller than the sum of its proper divisors (18241987148).

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

13021431220 is a wasteful number, since it uses less digits than its factorization.

13021431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35680 (or 35678 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13021431220 its reverse (2213412031), we get a palindrome (15234843251).

The spelling of 13021431220 in words is "thirteen billion, twenty-one million, four hundred thirty-one thousand, two hundred twenty".