1212021109499 has 2 divisors, whose sum is σ = 1212021109500. Its totient is φ = 1212021109498.

The previous prime is 1212021109493. The next prime is 1212021109501. The reversal of 1212021109499 is 9949011202121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212021109499 is a prime.

Together with 1212021109501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1212021109493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010554749 + 606010554750.

It is an arithmetic number, because the mean of its divisors is an integer number (606010554750).

Almost surely, 2^{1212021109499} is an apocalyptic number.

1212021109499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212021109499 is an equidigital number, since it uses as much as digits as its factorization.

1212021109499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 1212021109499 in words is "one trillion, two hundred twelve billion, twenty-one million, one hundred nine thousand, four hundred ninety-nine".