13021222 has 4 divisors (see below), whose sum is σ = 19531836. Its totient is φ = 6510610.

The previous prime is 13021219. The next prime is 13021247. The reversal of 13021222 is 22212031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22212031 = 727 ⋅30553.

It is a super-3 number, since 3×13021222³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255304 + ... + 3255307.

It is an arithmetic number, because the mean of its divisors is an integer number (4882959).

Almost surely, 2^13021222 is an apocalyptic number.

13021222 is a deficient number, since it is larger than the sum of its proper divisors (6510614).

13021222 is an equidigital number, since it uses as much as digits as its factorization.

13021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510613.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13021222 is about 3608.4930372664. The cubic root of 13021222 is about 235.2613479927.

Adding to 13021222 its reverse (22212031), we get a palindrome (35233253).

The spelling of 13021222 in words is "thirteen million, twenty-one thousand, two hundred twenty-two".