211211210021222 has 4 divisors (see below), whose sum is σ = 316816815031836. Its totient is φ = 105605605010610.

The previous prime is 211211210021213. The next prime is 211211210021233. The reversal of 211211210021222 is 222120012112112.

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

It is a super-2 number, since 2×211211210021222² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211210021194 and 211211210021203.

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, 52802802505304 + ... + 52802802505307.

It is an arithmetic number, because the mean of its divisors is an integer number (79204203757959).

Almost surely, 2^{211211210021222} is an apocalyptic number.

211211210021222 is a deficient number, since it is larger than the sum of its proper divisors (105605605010614).

211211210021222 is a wasteful number, since it uses less digits than its factorization.

211211210021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105605605010613.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211211210021222 its reverse (222120012112112), we get a palindrome (433331222133334).

The spelling of 211211210021222 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred ten million, twenty-one thousand, two hundred twenty-two".