11201202220021 has 4 divisors (see below), whose sum is σ = 12219493330944. Its totient is φ = 10182911109100.

The previous prime is 11201202219947. The next prime is 11201202220037. The reversal of 11201202220021 is 12002220210211.

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 11201202220021 - 2⁹ = 11201202219509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201202219977 and 11201202220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201202220081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509145555445 + ... + 509145555466.

It is an arithmetic number, because the mean of its divisors is an integer number (3054873332736).

Almost surely, 2^{11201202220021} is an apocalyptic number.

11201202220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11201202220021 is a deficient number, since it is larger than the sum of its proper divisors (1018291110923).

11201202220021 is a wasteful number, since it uses less digits than its factorization.

11201202220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018291110922.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11201202220021 its reverse (12002220210211), we get a palindrome (23203422430232).

The spelling of 11201202220021 in words is "eleven trillion, two hundred one billion, two hundred two million, two hundred twenty thousand, twenty-one".