780220220021101 has 16 divisors (see below), whose sum is σ = 842219280264960. Its totient is φ = 720561019171840.

The previous prime is 780220220021059. The next prime is 780220220021129. The reversal of 780220220021101 is 101120022022087.

It is a cyclic number.

It is not a de Polignac number, because 780220220021101 - 2⁹ = 780220220020589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 780220220021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780220220028101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244182861 + ... + 247357453.

It is an arithmetic number, because the mean of its divisors is an integer number (52638705016560).

Almost surely, 2^{780220220021101} is an apocalyptic number.

It is an amenable number.

780220220021101 is a deficient number, since it is larger than the sum of its proper divisors (61999060243859).

780220220021101 is a wasteful number, since it uses less digits than its factorization.

780220220021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3543116.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 780220220021101 its reverse (101120022022087), we get a palindrome (881340242043188).

The spelling of 780220220021101 in words is "seven hundred eighty trillion, two hundred twenty billion, two hundred twenty million, twenty-one thousand, one hundred one".