211220221222 has 4 divisors (see below), whose sum is σ = 316830331836. Its totient is φ = 105610110610.

The previous prime is 211220221189. The next prime is 211220221259. The reversal of 211220221222 is 222122022112.

211220221222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×211220221222² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211220221222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52805055304 + ... + 52805055307.

It is an arithmetic number, because the mean of its divisors is an integer number (79207582959).

Almost surely, 2^211220221222 is an apocalyptic number.

211220221222 is a deficient number, since it is larger than the sum of its proper divisors (105610110614).

211220221222 is a wasteful number, since it uses less digits than its factorization.

211220221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105610110613.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 211220221222 its reverse (222122022112), we get a palindrome (433342243334).

The spelling of 211220221222 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, two hundred twenty-two".