1211219983 has 2 divisors, whose sum is σ = 1211219984. Its totient is φ = 1211219982.

The previous prime is 1211219959. The next prime is 1211219987. The reversal of 1211219983 is 3899121121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211219983 - 2¹⁷ = 1211088911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211219987) 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 as a sum of consecutive naturals, namely, 605609991 + 605609992.

It is an arithmetic number, because the mean of its divisors is an integer number (605609992).

Almost surely, 2^1211219983 is an apocalyptic number.

1211219983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211219983 is an equidigital number, since it uses as much as digits as its factorization.

1211219983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 37.

The square root of 1211219983 is about 34802.5858665703. The cubic root of 1211219983 is about 1065.9602477705.

The spelling of 1211219983 in words is "one billion, two hundred eleven million, two hundred nineteen thousand, nine hundred eighty-three".