212111111221222 has 32 divisors (see below), whose sum is σ = 332262346291200. Its totient is φ = 101437820299200.

The previous prime is 212111111221181. The next prime is 212111111221231. The reversal of 212111111221222 is 222122111111212.

It is a super-2 number, since 2×212111111221222² (a number of 29 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 212111111221193 and 212111111221202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4689447 + ... + 21123757.

It is an arithmetic number, because the mean of its divisors is an integer number (10383198321600).

Almost surely, 2^{212111111221222} is an apocalyptic number.

212111111221222 is a deficient number, since it is larger than the sum of its proper divisors (120151235069978).

212111111221222 is a wasteful number, since it uses less digits than its factorization.

212111111221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16436772.

The product of its digits is 128, while the sum is 22.

Adding to 212111111221222 its reverse (222122111111212), we get a palindrome (434233222332434).

The spelling of 212111111221222 in words is "two hundred twelve trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, two hundred twenty-two".