13121222 has 16 divisors (see below), whose sum is σ = 20181744. Its totient is φ = 6396000.

The previous prime is 13121219. The next prime is 13121231. The reversal of 13121222 is 22212131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13121197 and 13121206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15572 + ... + 16392.

It is an arithmetic number, because the mean of its divisors is an integer number (1261359).

Almost surely, 2^13121222 is an apocalyptic number.

13121222 is a deficient number, since it is larger than the sum of its proper divisors (7060522).

13121222 is a wasteful number, since it uses less digits than its factorization.

13121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015.

The product of its digits is 48, while the sum is 14.

The square root of 13121222 is about 3622.3227354834. The cubic root of 13121222 is about 235.8620638942.

Adding to 13121222 its reverse (22212131), we get a palindrome (35333353).

Subtracting 13121222 from its reverse (22212131), we obtain a palindrome (9090909).

The spelling of 13121222 in words is "thirteen million, one hundred twenty-one thousand, two hundred twenty-two".