1221093510929 has 2 divisors, whose sum is σ = 1221093510930. Its totient is φ = 1221093510928.

The previous prime is 1221093510911. The next prime is 1221093510947. The reversal of 1221093510929 is 9290153901221.

It is a balanced prime because it is at equal distance from previous prime (1221093510911) and next prime (1221093510947).

It can be written as a sum of positive squares in only one way, i.e., 858476371600 + 362617139329 = 926540^2 + 602177^2 .

It is an emirp because it is prime and its reverse (9290153901221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221093510929 - 2²⁰ = 1221092462353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221093510929.

It is not a weakly prime, because it can be changed into another prime (1221093510029) 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, 610546755464 + 610546755465.

It is an arithmetic number, because the mean of its divisors is an integer number (610546755465).

Almost surely, 2^{1221093510929} is an apocalyptic number.

It is an amenable number.

1221093510929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221093510929 is an equidigital number, since it uses as much as digits as its factorization.

1221093510929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 44.

The spelling of 1221093510929 in words is "one trillion, two hundred twenty-one billion, ninety-three million, five hundred ten thousand, nine hundred twenty-nine".