1321222235 has 16 divisors (see below), whose sum is σ = 1751720256. Its totient is φ = 951548928.

The previous prime is 1321222219. The next prime is 1321222237. The reversal of 1321222235 is 5322221231.

It is a cyclic number.

It is not a de Polignac number, because 1321222235 - 2⁴ = 1321222219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 1321222235.

It is not an unprimeable number, because it can be changed into a prime (1321222237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 335954 + ... + 339863.

It is an arithmetic number, because the mean of its divisors is an integer number (109482516).

Almost surely, 2^1321222235 is an apocalyptic number.

1321222235 is a deficient number, since it is larger than the sum of its proper divisors (430498021).

1321222235 is a wasteful number, since it uses less digits than its factorization.

1321222235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675862.

The product of its digits is 1440, while the sum is 23.

The square root of 1321222235 is about 36348.6208129002. The cubic root of 1321222235 is about 1097.2997778870.

Adding to 1321222235 its reverse (5322221231), we get a palindrome (6643443466).

The spelling of 1321222235 in words is "one billion, three hundred twenty-one million, two hundred twenty-two thousand, two hundred thirty-five".