220100100001 has 4 divisors (see below), whose sum is σ = 221706670212. Its totient is φ = 218493529792.

The previous prime is 220100099977. The next prime is 220100100071. The reversal of 220100100001 is 100001001022.

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 157570096401 + 62530003600 = 396951^2 + 250060^2 .

It is a cyclic number.

It is not a de Polignac number, because 220100100001 - 2¹¹ = 220100097953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220100100071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803284900 + ... + 803285173.

It is an arithmetic number, because the mean of its divisors is an integer number (55426667553).

Almost surely, 2^220100100001 is an apocalyptic number.

It is an amenable number.

220100100001 is a deficient number, since it is larger than the sum of its proper divisors (1606570211).

220100100001 is a wasteful number, since it uses less digits than its factorization.

220100100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606570210.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 220100100001 its reverse (100001001022), we get a palindrome (320101101023).

The spelling of 220100100001 in words is "two hundred twenty billion, one hundred million, one hundred thousand, one".