11121221102001 has 16 divisors (see below), whose sum is σ = 14834205157824. Its totient is φ = 7411192737984.

The previous prime is 11121221101967. The next prime is 11121221102039. The reversal of 11121221102001 is 10020112212111.

It is a happy number.

It is not a de Polignac number, because 11121221102001 - 2⁶ = 11121221101937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11121221102071) 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, 95726190 + ... + 95842296.

It is an arithmetic number, because the mean of its divisors is an integer number (927137822364).

Almost surely, 2^{11121221102001} is an apocalyptic number.

It is an amenable number.

11121221102001 is a deficient number, since it is larger than the sum of its proper divisors (3712984055823).

11121221102001 is a wasteful number, since it uses less digits than its factorization.

11121221102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128560.

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

Adding to 11121221102001 its reverse (10020112212111), we get a palindrome (21141333314112).

The spelling of 11121221102001 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred two thousand, one".