212111122222 has 4 divisors (see below), whose sum is σ = 318166683336. Its totient is φ = 106055561110.

The previous prime is 212111122213. The next prime is 212111122303. The reversal of 212111122222 is 222221111212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×212111122222² (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 212111122222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53027780554 + ... + 53027780557.

It is an arithmetic number, because the mean of its divisors is an integer number (79541670834).

Almost surely, 2^212111122222 is an apocalyptic number.

212111122222 is a deficient number, since it is larger than the sum of its proper divisors (106055561114).

212111122222 is a wasteful number, since it uses less digits than its factorization.

212111122222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106055561113.

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

Adding to 212111122222 its reverse (222221111212), we get a palindrome (434332233434).

The spelling of 212111122222 in words is "two hundred twelve billion, one hundred eleven million, one hundred twenty-two thousand, two hundred twenty-two".