11201212011221 has 8 divisors (see below), whose sum is σ = 11230192740000. Its totient is φ = 11172232236240.

The previous prime is 11201212011203. The next prime is 11201212011229. The reversal of 11201212011221 is 12211021210211.

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 11201212011221 - 2²² = 11201207816917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11201212011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201212011229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27420530 + ... + 27826028.

It is an arithmetic number, because the mean of its divisors is an integer number (1403774092500).

Almost surely, 2^{11201212011221} is an apocalyptic number.

It is an amenable number.

11201212011221 is a deficient number, since it is larger than the sum of its proper divisors (28980728779).

11201212011221 is an equidigital number, since it uses as much as digits as its factorization.

11201212011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476899.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11201212011221 its reverse (12211021210211), we get a palindrome (23412233221432).

The spelling of 11201212011221 in words is "eleven trillion, two hundred one billion, two hundred twelve million, eleven thousand, two hundred twenty-one".