1220303121 has 8 divisors (see below), whose sum is σ = 1639491744. Its totient is φ = 807324960.

The previous prime is 1220303099. The next prime is 1220303137. The reversal of 1220303121 is 1213030221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220303121 - 2⁵ = 1220303089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220303121.

It is not an unprimeable number, because it can be changed into a prime (1220303921) 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 7 ways as a sum of consecutive naturals, for example, 1552156 + ... + 1552941.

It is an arithmetic number, because the mean of its divisors is an integer number (204936468).

Almost surely, 2^1220303121 is an apocalyptic number.

It is an amenable number.

1220303121 is a deficient number, since it is larger than the sum of its proper divisors (419188623).

1220303121 is a wasteful number, since it uses less digits than its factorization.

1220303121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105231.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1220303121 is about 34932.8372881448. The cubic root of 1220303121 is about 1068.6182183946.

Adding to 1220303121 its reverse (1213030221), we get a palindrome (2433333342).

The spelling of 1220303121 in words is "one billion, two hundred twenty million, three hundred three thousand, one hundred twenty-one".