211122121222 has 16 divisors (see below), whose sum is σ = 323762780160. Its totient is φ = 103205939848.

The previous prime is 211122121181. The next prime is 211122121237. The reversal of 211122121222 is 222121221112.

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 211122121222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1096822 + ... + 1274857.

It is an arithmetic number, because the mean of its divisors is an integer number (20235173760).

Almost surely, 2^211122121222 is an apocalyptic number.

211122121222 is a deficient number, since it is larger than the sum of its proper divisors (112640658938).

211122121222 is a wasteful number, since it uses less digits than its factorization.

211122121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372675.

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

Adding to 211122121222 its reverse (222121221112), we get a palindrome (433243342334).

The spelling of 211122121222 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".