11222212222121 has 16 divisors (see below), whose sum is σ = 12399284822400. Its totient is φ = 10102601296128.

The previous prime is 11222212222037. The next prime is 11222212222129. The reversal of 11222212222121 is 12122221222211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11222212222121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11222212222129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15752495 + ... + 16449483.

It is an arithmetic number, because the mean of its divisors is an integer number (774955301400).

Almost surely, 2^{11222212222121} is an apocalyptic number.

It is an amenable number.

11222212222121 is a deficient number, since it is larger than the sum of its proper divisors (1177072600279).

11222212222121 is a wasteful number, since it uses less digits than its factorization.

11222212222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738208.

The product of its digits is 512, while the sum is 23.

Adding to 11222212222121 its reverse (12122221222211), we get a palindrome (23344433444332).

The spelling of 11222212222121 in words is "eleven trillion, two hundred twenty-two billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".