1212255321 has 16 divisors (see below), whose sum is σ = 1646462784. Its totient is φ = 793197504.

The previous prime is 1212255313. The next prime is 1212255367. The reversal of 1212255321 is 1235522121.

It is not a de Polignac number, because 1212255321 - 2³ = 1212255313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212255291 and 1212255300.

It is not an unprimeable number, because it can be changed into a prime (1212255391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44791 + ... + 66563.

It is an arithmetic number, because the mean of its divisors is an integer number (102903924).

Almost surely, 2^1212255321 is an apocalyptic number.

It is an amenable number.

1212255321 is a deficient number, since it is larger than the sum of its proper divisors (434207463).

1212255321 is a wasteful number, since it uses less digits than its factorization.

1212255321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22120.

The product of its digits is 1200, while the sum is 24.

The square root of 1212255321 is about 34817.4571300088. The cubic root of 1212255321 is about 1066.2638851111.

Adding to 1212255321 its reverse (1235522121), we get a palindrome (2447777442).

The spelling of 1212255321 in words is "one billion, two hundred twelve million, two hundred fifty-five thousand, three hundred twenty-one".