1212029999 has 2 divisors, whose sum is σ = 1212030000. Its totient is φ = 1212029998.

The previous prime is 1212029989. The next prime is 1212030013. The reversal of 1212029999 is 9999202121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9999202121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212029999 - 2⁴ = 1212029983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212029939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606014999 + 606015000.

It is an arithmetic number, because the mean of its divisors is an integer number (606015000).

Almost surely, 2^1212029999 is an apocalyptic number.

1212029999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212029999 is an equidigital number, since it uses as much as digits as its factorization.

1212029999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 1212029999 is about 34814.2212177725. The cubic root of 1212029999 is about 1066.1978188312.

The spelling of 1212029999 in words is "one billion, two hundred twelve million, twenty-nine thousand, nine hundred ninety-nine".