11201121120021 has 16 divisors (see below), whose sum is σ = 17068724073984. Its totient is φ = 6400509752304.

The previous prime is 11201121120017. The next prime is 11201121120023. The reversal of 11201121120021 is 12002112110211.

It is a happy number.

It is not a de Polignac number, because 11201121120021 - 2² = 11201121120017 is a prime.

It is a super-2 number, since 2×11201121120021² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201121120023) 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, 4397511 + ... + 6460676.

It is an arithmetic number, because the mean of its divisors is an integer number (1066795254624).

Almost surely, 2^{11201121120021} is an apocalyptic number.

It is an amenable number.

11201121120021 is a deficient number, since it is larger than the sum of its proper divisors (5867602953963).

11201121120021 is a wasteful number, since it uses less digits than its factorization.

11201121120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10907320.

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

Adding to 11201121120021 its reverse (12002112110211), we get a palindrome (23203233230232).

The spelling of 11201121120021 in words is "eleven trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty thousand, twenty-one".