780011100101 has 2 divisors, whose sum is σ = 780011100102. Its totient is φ = 780011100100.

The previous prime is 780011099957. The next prime is 780011100103. The reversal of 780011100101 is 101001110087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 622953447076 + 157057653025 = 789274^2 + 396305^2 .

It is an emirp because it is prime and its reverse (101001110087) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780011100101 is a prime.

Together with 780011100103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780011100103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390005550050 + 390005550051.

It is an arithmetic number, because the mean of its divisors is an integer number (390005550051).

Almost surely, 2^780011100101 is an apocalyptic number.

It is an amenable number.

780011100101 is a deficient number, since it is larger than the sum of its proper divisors (1).

780011100101 is an equidigital number, since it uses as much as digits as its factorization.

780011100101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 780011100101 its reverse (101001110087), we get a palindrome (881012210188).

The spelling of 780011100101 in words is "seven hundred eighty billion, eleven million, one hundred thousand, one hundred one".