1212321241 has 4 divisors (see below), whose sum is σ = 1213308900. Its totient is φ = 1211333584.

The previous prime is 1212321233. The next prime is 1212321263. The reversal of 1212321241 is 1421232121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1421232121 = 193 ⋅7363897.

It can be written as a sum of positive squares in 2 ways, for example, as 775344025 + 436977216 = 27845^2 + 20904^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212321241 - 2³ = 1212321233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212321041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491986 + ... + 494443.

It is an arithmetic number, because the mean of its divisors is an integer number (303327225).

Almost surely, 2^1212321241 is an apocalyptic number.

It is an amenable number.

1212321241 is a deficient number, since it is larger than the sum of its proper divisors (987659).

1212321241 is an equidigital number, since it uses as much as digits as its factorization.

1212321241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987658.

The product of its digits is 192, while the sum is 19.

The square root of 1212321241 is about 34818.4037686968. The cubic root of 1212321241 is about 1066.2832118541.

Adding to 1212321241 its reverse (1421232121), we get a palindrome (2633553362).

The spelling of 1212321241 in words is "one billion, two hundred twelve million, three hundred twenty-one thousand, two hundred forty-one".