1212118493 has 2 divisors, whose sum is σ = 1212118494. Its totient is φ = 1212118492.

The previous prime is 1212118489. The next prime is 1212118541. The reversal of 1212118493 is 3948112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 937155769 + 274962724 = 30613^2 + 16582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212118493 - 2² = 1212118489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212118463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606059246 + 606059247.

It is an arithmetic number, because the mean of its divisors is an integer number (606059247).

Almost surely, 2^1212118493 is an apocalyptic number.

It is an amenable number.

1212118493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212118493 is an equidigital number, since it uses as much as digits as its factorization.

1212118493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 1212118493 is about 34815.4921407123. The cubic root of 1212118493 is about 1066.2237669825.

The spelling of 1212118493 in words is "one billion, two hundred twelve million, one hundred eighteen thousand, four hundred ninety-three".