10011112221001 has 4 divisors (see below), whose sum is σ = 10061930049732. Its totient is φ = 9960294392272.

The previous prime is 10011112220999. The next prime is 10011112221023. The reversal of 10011112221001 is 10012221111001.

It is a happy number.

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 9733925765776 + 277186455225 = 3119924^2 + 526485^2 .

It is a cyclic number.

It is not a de Polignac number, because 10011112221001 - 2¹ = 10011112220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10011112221031) 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, 25408914070 + ... + 25408914463.

It is an arithmetic number, because the mean of its divisors is an integer number (2515482512433).

Almost surely, 2^{10011112221001} is an apocalyptic number.

It is an amenable number.

10011112221001 is a deficient number, since it is larger than the sum of its proper divisors (50817828731).

10011112221001 is an equidigital number, since it uses as much as digits as its factorization.

10011112221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50817828730.

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

Adding to 10011112221001 its reverse (10012221111001), we get a palindrome (20023333332002).

Subtracting 10011112221001 from its reverse (10012221111001), we obtain a square (1108890000 = 33300²).

The spelling of 10011112221001 in words is "ten trillion, eleven billion, one hundred twelve million, two hundred twenty-one thousand, one".