11122212221121 has 64 divisors (see below), whose sum is σ = 16775506944000. Its totient is φ = 6517482316800.

The previous prime is 11122212220981. The next prime is 11122212221143. The reversal of 11122212221121 is 12112221222111.

It is not a de Polignac number, because 11122212221121 - 2¹⁹ = 11122211696833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11122212226121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 96179266 + ... + 96294836.

It is an arithmetic number, because the mean of its divisors is an integer number (262117296000).

Almost surely, 2^{11122212221121} is an apocalyptic number.

It is an amenable number.

11122212221121 is a deficient number, since it is larger than the sum of its proper divisors (5653294722879).

11122212221121 is a wasteful number, since it uses less digits than its factorization.

11122212221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117750.

The product of its digits is 128, while the sum is 21.

Adding to 11122212221121 its reverse (12112221222111), we get a palindrome (23234433443232).

The spelling of 11122212221121 in words is "eleven trillion, one hundred twenty-two billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".