1222120757857 has 2 divisors, whose sum is σ = 1222120757858. Its totient is φ = 1222120757856.

The previous prime is 1222120757807. The next prime is 1222120757863. The reversal of 1222120757857 is 7587570212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 781033505121 + 441087252736 = 883761^2 + 664144^2 .

It is an emirp because it is prime and its reverse (7587570212221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222120757857 - 2¹¹ = 1222120755809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222120757857.

It is not a weakly prime, because it can be changed into another prime (1222120757807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611060378928 + 611060378929.

It is an arithmetic number, because the mean of its divisors is an integer number (611060378929).

Almost surely, 2^{1222120757857} is an apocalyptic number.

It is an amenable number.

1222120757857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222120757857 is an equidigital number, since it uses as much as digits as its factorization.

1222120757857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1097600, while the sum is 49.

The spelling of 1222120757857 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, seven hundred fifty-seven thousand, eight hundred fifty-seven".