1225133121 has 8 divisors (see below), whose sum is σ = 1638219744. Its totient is φ = 814400960.

The previous prime is 1225133099. The next prime is 1225133153. The reversal of 1225133121 is 1213315221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225133121 - 2²⁷ = 1090915393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1225133321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587400 + ... + 589481.

It is an arithmetic number, because the mean of its divisors is an integer number (204777468).

Almost surely, 2^1225133121 is an apocalyptic number.

It is an amenable number.

1225133121 is a deficient number, since it is larger than the sum of its proper divisors (413086623).

1225133121 is a wasteful number, since it uses less digits than its factorization.

1225133121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177231.

The product of its digits is 360, while the sum is 21.

The square root of 1225133121 is about 35001.9016769089. The cubic root of 1225133121 is about 1070.0262377472.

Adding to 1225133121 its reverse (1213315221), we get a palindrome (2438448342).

The spelling of 1225133121 in words is "one billion, two hundred twenty-five million, one hundred thirty-three thousand, one hundred twenty-one".