780100222222001 has 4 divisors (see below), whose sum is σ = 780379128274932. Its totient is φ = 779821316169072.

The previous prime is 780100222221977. The next prime is 780100222222093. The reversal of 780100222222001 is 100222222001087.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 346655095992976 + 433445126229025 = 18618676^2 + 20819345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780100222222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (780100224222001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139453022270 + ... + 139453027863.

It is an arithmetic number, because the mean of its divisors is an integer number (195094782068733).

Almost surely, 2^{780100222222001} is an apocalyptic number.

It is an amenable number.

780100222222001 is a deficient number, since it is larger than the sum of its proper divisors (278906052931).

780100222222001 is a wasteful number, since it uses less digits than its factorization.

780100222222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278906052930.

The product of its (nonzero) digits is 3584, while the sum is 29.

Adding to 780100222222001 its reverse (100222222001087), we get a palindrome (880322444223088).

The spelling of 780100222222001 in words is "seven hundred eighty trillion, one hundred billion, two hundred twenty-two million, two hundred twenty-two thousand, one".