13220312002 has 12 divisors (see below), whose sum is σ = 20730150630. Its totient is φ = 6322757408.

The previous prime is 13220311957. The next prime is 13220312003. The reversal of 13220312002 is 20021302231.

It can be written as a sum of positive squares in only one way, i.e., 8749918681 + 4470393321 = 93541^2 + 66861^2 .

It is not an unprimeable number, because it can be changed into a prime (13220312003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6246727 + ... + 6248842.

Almost surely, 2^13220312002 is an apocalyptic number.

13220312002 is a deficient number, since it is larger than the sum of its proper divisors (7509838628).

13220312002 is a wasteful number, since it uses less digits than its factorization.

13220312002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12495617 (or 12495594 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 13220312002 its reverse (20021302231), we get a palindrome (33241614233).

The spelling of 13220312002 in words is "thirteen billion, two hundred twenty million, three hundred twelve thousand, two".