211121221222 has 32 divisors (see below), whose sum is σ = 338092330752. Its totient is φ = 98530059264.

The previous prime is 211121221189. The next prime is 211121221229. The reversal of 211121221222 is 222122121112.

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 211121221222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121221229) 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, 2046123 + ... + 2146825.

It is an arithmetic number, because the mean of its divisors is an integer number (10565385336).

Almost surely, 2^211121221222 is an apocalyptic number.

211121221222 is a deficient number, since it is larger than the sum of its proper divisors (126971109530).

211121221222 is a wasteful number, since it uses less digits than its factorization.

211121221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101232.

The product of its digits is 128, while the sum is 19.

Adding to 211121221222 its reverse (222122121112), we get a palindrome (433243342334).

The spelling of 211121221222 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".