1212321299 has 12 divisors (see below), whose sum is σ = 1421362944. Its totient is φ = 1030945104.

The previous prime is 1212321263. The next prime is 1212321347. The reversal of 1212321299 is 9921232121.

It is a happy number.

It is not a de Polignac number, because 1212321299 - 2¹² = 1212317203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212321499) 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 11 ways as a sum of consecutive naturals, for example, 91184 + ... + 103629.

It is an arithmetic number, because the mean of its divisors is an integer number (118446912).

Almost surely, 2^1212321299 is an apocalyptic number.

1212321299 is a deficient number, since it is larger than the sum of its proper divisors (209041645).

1212321299 is a wasteful number, since it uses less digits than its factorization.

1212321299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194954 (or 194947 counting only the distinct ones).

The product of its digits is 3888, while the sum is 32.

The square root of 1212321299 is about 34818.4046015897. The cubic root of 1212321299 is about 1066.2832288585.

The spelling of 1212321299 in words is "one billion, two hundred twelve million, three hundred twenty-one thousand, two hundred ninety-nine".