13221222002 has 4 divisors (see below), whose sum is σ = 19831833006. Its totient is φ = 6610611000.

The previous prime is 13221221983. The next prime is 13221222019. The reversal of 13221222002 is 20022212231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20022212231 = 7 ⋅2860316033.

It can be written as a sum of positive squares in only one way, i.e., 12966149161 + 255072841 = 113869^2 + 15971^2 .

It is a super-2 number, since 2×13221222002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3305305499 + ... + 3305305502.

Almost surely, 2^13221222002 is an apocalyptic number.

13221222002 is a deficient number, since it is larger than the sum of its proper divisors (6610611004).

13221222002 is an equidigital number, since it uses as much as digits as its factorization.

13221222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6610611003.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 13221222002 its reverse (20022212231), we get a palindrome (33243434233).

The spelling of 13221222002 in words is "thirteen billion, two hundred twenty-one million, two hundred twenty-two thousand, two".