212211221122 has 64 divisors (see below), whose sum is σ = 360325324800. Its totient is φ = 93296016000.

The previous prime is 212211221107. The next prime is 212211221129. The reversal of 212211221122 is 221122112212.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 212211221122.

It is not an unprimeable number, because it can be changed into a prime (212211221129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2812347 + ... + 2886817.

It is an arithmetic number, because the mean of its divisors is an integer number (5630083200).

Almost surely, 2^212211221122 is an apocalyptic number.

212211221122 is a deficient number, since it is larger than the sum of its proper divisors (148114103678).

212211221122 is a wasteful number, since it uses less digits than its factorization.

212211221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74623.

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

Adding to 212211221122 its reverse (221122112212), we get a palindrome (433333333334).

The spelling of 212211221122 in words is "two hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-two".