211121111222 has 16 divisors (see below), whose sum is σ = 374401971360. Its totient is φ = 87360459648.

The previous prime is 211121111219. The next prime is 211121111231. The reversal of 211121111222 is 222111121112.

It is a super-2 number, since 2×211121111222² (a number of 23 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 211121111222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 260000963 + ... + 260001774.

It is an arithmetic number, because the mean of its divisors is an integer number (23400123210).

Almost surely, 2^211121111222 is an apocalyptic number.

211121111222 is a deficient number, since it is larger than the sum of its proper divisors (163280860138).

211121111222 is a wasteful number, since it uses less digits than its factorization.

211121111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520002775.

The product of its digits is 32, while the sum is 17.

Adding to 211121111222 its reverse (222111121112), we get a palindrome (433232232334).

The spelling of 211121111222 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-two".