13021303220 has 24 divisors (see below), whose sum is σ = 27386639784. Its totient is φ = 5200539776.

The previous prime is 13021303219. The next prime is 13021303247. The reversal of 13021303220 is 2230312031.

It can be written as a sum of positive squares in 4 ways, for example, as 690533284 + 12330769936 = 26278^2 + 111044^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485459 + ... + 511578.

It is an arithmetic number, because the mean of its divisors is an integer number (1141109991).

Almost surely, 2^13021303220 is an apocalyptic number.

13021303220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13021303220 is an abundant number, since it is smaller than the sum of its proper divisors (14365336564).

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

13021303220 is a wasteful number, since it uses less digits than its factorization.

13021303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997699 (or 997697 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 13021303220 its reverse (2230312031), we get a palindrome (15251615251).

The spelling of 13021303220 in words is "thirteen billion, twenty-one million, three hundred three thousand, two hundred twenty".