11201222222121 has 32 divisors (see below), whose sum is σ = 15445147910400. Its totient is φ = 7215366401280.

The previous prime is 11201222222117. The next prime is 11201222222137. The reversal of 11201222222121 is 12122222210211.

It is not a de Polignac number, because 11201222222121 - 2² = 11201222222117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11201222222101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8683035 + ... + 9889263.

It is an arithmetic number, because the mean of its divisors is an integer number (482660872200).

Almost surely, 2^{11201222222121} is an apocalyptic number.

It is an amenable number.

11201222222121 is a deficient number, since it is larger than the sum of its proper divisors (4243925688279).

11201222222121 is a wasteful number, since it uses less digits than its factorization.

11201222222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206849.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 11201222222121 its reverse (12122222210211), we get a palindrome (23323444432332).

The spelling of 11201222222121 in words is "eleven trillion, two hundred one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".