1222013121 has 16 divisors (see below), whose sum is σ = 1862707200. Its totient is φ = 698071248.

The previous prime is 1222013059. The next prime is 1222013137. The reversal of 1222013121 is 1213102221.

It is a de Polignac number, because none of the positive numbers 2^k-1222013121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222013121.

It is not an unprimeable number, because it can be changed into a prime (1222013921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77160 + ... + 91638.

It is an arithmetic number, because the mean of its divisors is an integer number (116419200).

Almost surely, 2^1222013121 is an apocalyptic number.

It is an amenable number.

1222013121 is a deficient number, since it is larger than the sum of its proper divisors (640694079).

1222013121 is a wasteful number, since it uses less digits than its factorization.

1222013121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18508.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1222013121 is about 34957.3042581947. The cubic root of 1222013121 is about 1069.1171338531.

Adding to 1222013121 its reverse (1213102221), we get a palindrome (2435115342).

The spelling of 1222013121 in words is "one billion, two hundred twenty-two million, thirteen thousand, one hundred twenty-one".