780534300121 has 2 divisors, whose sum is σ = 780534300122. Its totient is φ = 780534300120.

The previous prime is 780534300113. The next prime is 780534300187. The reversal of 780534300121 is 121003435087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439484140096 + 341050160025 = 662936^2 + 583995^2 .

It is an emirp because it is prime and its reverse (121003435087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 780534300121 - 2³ = 780534300113 is a prime.

It is a super-2 number, since 2×780534300121² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (780534300191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390267150060 + 390267150061.

It is an arithmetic number, because the mean of its divisors is an integer number (390267150061).

Almost surely, 2^780534300121 is an apocalyptic number.

It is an amenable number.

780534300121 is a deficient number, since it is larger than the sum of its proper divisors (1).

780534300121 is an equidigital number, since it uses as much as digits as its factorization.

780534300121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 780534300121 in words is "seven hundred eighty billion, five hundred thirty-four million, three hundred thousand, one hundred twenty-one".