201111100001 has 8 divisors (see below), whose sum is σ = 229844507904. Its totient is φ = 172378504800.

The previous prime is 201111099997. The next prime is 201111100007. The reversal of 201111100001 is 100001111102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201111100001 - 2² = 201111099997 is a prime.

It is a super-2 number, since 2×201111100001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201111100007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480461 + ... + 795653.

It is an arithmetic number, because the mean of its divisors is an integer number (28730563488).

Almost surely, 2^201111100001 is an apocalyptic number.

It is an amenable number.

201111100001 is a deficient number, since it is larger than the sum of its proper divisors (28733407903).

201111100001 is an equidigital number, since it uses as much as digits as its factorization.

201111100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406351.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 201111100001 its reverse (100001111102), we get a palindrome (301112211103).

The spelling of 201111100001 in words is "two hundred one billion, one hundred eleven million, one hundred thousand, one".