11222122220121 has 16 divisors (see below), whose sum is σ = 14983933929536. Its totient is φ = 7470867370176.

The previous prime is 11222122220117. The next prime is 11222122220123. The reversal of 11222122220121 is 12102222122211.

It is not a de Polignac number, because 11222122220121 - 2² = 11222122220117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11222122220123) 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 15 ways as a sum of consecutive naturals, for example, 8984571 + ... + 10157103.

It is an arithmetic number, because the mean of its divisors is an integer number (936495870596).

Almost surely, 2^{11222122220121} is an apocalyptic number.

It is an amenable number.

11222122220121 is a deficient number, since it is larger than the sum of its proper divisors (3761811709415).

11222122220121 is a wasteful number, since it uses less digits than its factorization.

11222122220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177032.

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

Adding to 11222122220121 its reverse (12102222122211), we get a palindrome (23324344342332).

The spelling of 11222122220121 in words is "eleven trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".