111111010001 has 4 divisors (see below), whose sum is σ = 111118115904. Its totient is φ = 111103904100.

The previous prime is 111111009991. The next prime is 111111010033. The reversal of 111111010001 is 100010111111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111111010001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111111510001) 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, 3529445 + ... + 3560786.

It is an arithmetic number, because the mean of its divisors is an integer number (27779528976).

Almost surely, 2^111111010001 is an apocalyptic number.

It is an amenable number.

111111010001 is a deficient number, since it is larger than the sum of its proper divisors (7105903).

111111010001 is an equidigital number, since it uses as much as digits as its factorization.

111111010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7105902.

The product of its (nonzero) digits is 1, while the sum is 8.

Adding to 111111010001 its reverse (100010111111), we get a palindrome (211121121112).

The spelling of 111111010001 in words is "one hundred eleven billion, one hundred eleven million, ten thousand, one".