1221303325 has 12 divisors (see below), whose sum is σ = 1652090688. Its totient is φ = 888220400.

The previous prime is 1221303323. The next prime is 1221303331. The reversal of 1221303325 is 5233031221.

It is not a de Polignac number, because 1221303325 - 2¹ = 1221303323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221303296 and 1221303305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221303323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2220277 + ... + 2220826.

It is an arithmetic number, because the mean of its divisors is an integer number (137674224).

Almost surely, 2^1221303325 is an apocalyptic number.

It is an amenable number.

1221303325 is a deficient number, since it is larger than the sum of its proper divisors (430787363).

1221303325 is a wasteful number, since it uses less digits than its factorization.

1221303325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441124 (or 4441119 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1221303325 is about 34947.1504560815. The cubic root of 1221303325 is about 1068.9100978771.

Adding to 1221303325 its reverse (5233031221), we get a palindrome (6454334546).

The spelling of 1221303325 in words is "one billion, two hundred twenty-one million, three hundred three thousand, three hundred twenty-five".