11112212222021 has 16 divisors (see below), whose sum is σ = 11865250552320. Its totient is φ = 10381675421040.

The previous prime is 11112212221921. The next prime is 11112212222051. The reversal of 11112212222021 is 12022221221111.

It is a cyclic number.

It is not a de Polignac number, because 11112212222021 - 2¹⁴ = 11112212205637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112212221984 and 11112212222002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112212222051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72376466 + ... + 72529836.

It is an arithmetic number, because the mean of its divisors is an integer number (741578159520).

Almost surely, 2^{11112212222021} is an apocalyptic number.

It is an amenable number.

11112212222021 is a deficient number, since it is larger than the sum of its proper divisors (753038330299).

11112212222021 is a wasteful number, since it uses less digits than its factorization.

11112212222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226696.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11112212222021 its reverse (12022221221111), we get a palindrome (23134433443132).

The spelling of 11112212222021 in words is "eleven trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, twenty-one".