11221111020001 has 4 divisors (see below), whose sum is σ = 11221918250004. Its totient is φ = 11220303790000.

The previous prime is 11221111019959. The next prime is 11221111020137. The reversal of 11221111020001 is 10002011112211.

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 5721898418401 + 5499212601600 = 2392049^2 + 2345040^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221111020001 - 2³¹ = 11218963536353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221111020401) 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, 403594150 + ... + 403621951.

It is an arithmetic number, because the mean of its divisors is an integer number (2805479562501).

Almost surely, 2^{11221111020001} is an apocalyptic number.

It is an amenable number.

11221111020001 is a deficient number, since it is larger than the sum of its proper divisors (807230003).

11221111020001 is an equidigital number, since it uses as much as digits as its factorization.

11221111020001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807230002.

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

Adding to 11221111020001 its reverse (10002011112211), we get a palindrome (21223122132212).

The spelling of 11221111020001 in words is "eleven trillion, two hundred twenty-one billion, one hundred eleven million, twenty thousand, one".