1255332121 has 2 divisors, whose sum is σ = 1255332122. Its totient is φ = 1255332120.

The previous prime is 1255332119. The next prime is 1255332151. The reversal of 1255332121 is 1212335521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1141696521 + 113635600 = 33789^2 + 10660^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255332121 - 2¹ = 1255332119 is a prime.

Together with 1255332119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1255332151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627666060 + 627666061.

It is an arithmetic number, because the mean of its divisors is an integer number (627666061).

Almost surely, 2^1255332121 is an apocalyptic number.

It is an amenable number.

1255332121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255332121 is an equidigital number, since it uses as much as digits as its factorization.

1255332121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 1255332121 is about 35430.6663922653. Note that the first 3 decimals coincide. The cubic root of 1255332121 is about 1078.7468664421.

Adding to 1255332121 its reverse (1212335521), we get a palindrome (2467667642).

The spelling of 1255332121 in words is "one billion, two hundred fifty-five million, three hundred thirty-two thousand, one hundred twenty-one".