11112221010001 has 16 divisors (see below), whose sum is σ = 11323632116160. Its totient is φ = 10901774220480.

The previous prime is 11112221009927. The next prime is 11112221010061. The reversal of 11112221010001 is 10001012221111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11112221010001 - 2¹³ = 11112221001809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11112221010061) 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, 64493995 + ... + 64666063.

It is an arithmetic number, because the mean of its divisors is an integer number (707727007260).

Almost surely, 2^{11112221010001} is an apocalyptic number.

It is an amenable number.

11112221010001 is a deficient number, since it is larger than the sum of its proper divisors (211411106159).

11112221010001 is a wasteful number, since it uses less digits than its factorization.

11112221010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174864.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11112221010001 its reverse (10001012221111), we get a palindrome (21113233231112).

The spelling of 11112221010001 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, ten thousand, one".