11201212220021 has 8 divisors (see below), whose sum is σ = 11216471635584. Its totient is φ = 11185953299920.

The previous prime is 11201212220017. The next prime is 11201212220027. The reversal of 11201212220021 is 12002221210211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11201212220021 - 2² = 11201212220017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201212220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81855560 + ... + 81992286.

It is an arithmetic number, because the mean of its divisors is an integer number (1402058954448).

Almost surely, 2^{11201212220021} is an apocalyptic number.

It is an amenable number.

11201212220021 is a deficient number, since it is larger than the sum of its proper divisors (15259415563).

11201212220021 is a wasteful number, since it uses less digits than its factorization.

11201212220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247731.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11201212220021 its reverse (12002221210211), we get a palindrome (23203433430232).

The spelling of 11201212220021 in words is "eleven trillion, two hundred one billion, two hundred twelve million, two hundred twenty thousand, twenty-one".