220888911709 has 2 divisors, whose sum is σ = 220888911710. Its totient is φ = 220888911708.

The previous prime is 220888911707. The next prime is 220888911773. The reversal of 220888911709 is 907119888022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201058076025 + 19830835684 = 448395^2 + 140822^2 .

It is a cyclic number.

It is not a de Polignac number, because 220888911709 - 2¹ = 220888911707 is a prime.

It is a super-2 number, since 2×220888911709² (a number of 23 digits) contains 22 as substring.

Together with 220888911707, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 220888911709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220888911701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110444455854 + 110444455855.

It is an arithmetic number, because the mean of its divisors is an integer number (110444455855).

Almost surely, 2^220888911709 is an apocalyptic number.

It is an amenable number.

220888911709 is a deficient number, since it is larger than the sum of its proper divisors (1).

220888911709 is an equidigital number, since it uses as much as digits as its factorization.

220888911709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 55.

The spelling of 220888911709 in words is "two hundred twenty billion, eight hundred eighty-eight million, nine hundred eleven thousand, seven hundred nine".