1225133321 has 2 divisors, whose sum is σ = 1225133322. Its totient is φ = 1225133320.

The previous prime is 1225133297. The next prime is 1225133363. The reversal of 1225133321 is 1233315221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1093228096 + 131905225 = 33064^2 + 11485^2 .

It is an emirp because it is prime and its reverse (1233315221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225133321 - 2¹⁸ = 1224871177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225135321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612566660 + 612566661.

It is an arithmetic number, because the mean of its divisors is an integer number (612566661).

Almost surely, 2^1225133321 is an apocalyptic number.

It is an amenable number.

1225133321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225133321 is an equidigital number, since it uses as much as digits as its factorization.

1225133321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 1225133321 is about 35001.9045338964. The cubic root of 1225133321 is about 1070.0262959735.

Adding to 1225133321 its reverse (1233315221), we get a palindrome (2458448542).

The spelling of 1225133321 in words is "one billion, two hundred twenty-five million, one hundred thirty-three thousand, three hundred twenty-one".