1321221122 has 16 divisors (see below), whose sum is σ = 2161299840. Its totient is φ = 602074512.

The previous prime is 1321221119. The next prime is 1321221137. The reversal of 1321221122 is 2211221231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321221122.

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, 319568 + ... + 323675.

It is an arithmetic number, because the mean of its divisors is an integer number (135081240).

Almost surely, 2^1321221122 is an apocalyptic number.

1321221122 is a deficient number, since it is larger than the sum of its proper divisors (840078718).

1321221122 is a wasteful number, since it uses less digits than its factorization.

1321221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643337.

The product of its digits is 96, while the sum is 17.

The square root of 1321221122 is about 36348.6055028250. The cubic root of 1321221122 is about 1097.2994697644.

Adding to 1321221122 its reverse (2211221231), we get a palindrome (3532442353).

The spelling of 1321221122 in words is "one billion, three hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-two".