11021221112001 has 4 divisors (see below), whose sum is σ = 14694961482672. Its totient is φ = 7347480741332.

The previous prime is 11021221111997. The next prime is 11021221112071. The reversal of 11021221112001 is 10021112212011.

It is a happy number.

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 not a de Polignac number, because 11021221112001 - 2² = 11021221111997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11021221112071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836870185331 + ... + 1836870185336.

It is an arithmetic number, because the mean of its divisors is an integer number (3673740370668).

Almost surely, 2^{11021221112001} is an apocalyptic number.

It is an amenable number.

11021221112001 is a deficient number, since it is larger than the sum of its proper divisors (3673740370671).

11021221112001 is an equidigital number, since it uses as much as digits as its factorization.

11021221112001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673740370670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11021221112001 its reverse (10021112212011), we get a palindrome (21042333324012).

The spelling of 11021221112001 in words is "eleven trillion, twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, one".