1212209983 has 2 divisors, whose sum is σ = 1212209984. Its totient is φ = 1212209982.

The previous prime is 1212209953. The next prime is 1212209989. The reversal of 1212209983 is 3899022121.

It is a strong prime.

It is an emirp because it is prime and its reverse (3899022121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212209983 - 2⁵ = 1212209951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212209989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606104991 + 606104992.

It is an arithmetic number, because the mean of its divisors is an integer number (606104992).

Almost surely, 2^1212209983 is an apocalyptic number.

1212209983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212209983 is an equidigital number, since it uses as much as digits as its factorization.

1212209983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1212209983 is about 34816.8060424847. The cubic root of 1212209983 is about 1066.2505922912.

The spelling of 1212209983 in words is "one billion, two hundred twelve million, two hundred nine thousand, nine hundred eighty-three".