211111222022 has 4 divisors (see below), whose sum is σ = 316666833036. Its totient is φ = 105555611010.

The previous prime is 211111221977. The next prime is 211111222027. The reversal of 211111222022 is 220222111112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111222027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52777805504 + ... + 52777805507.

It is an arithmetic number, because the mean of its divisors is an integer number (79166708259).

Almost surely, 2^211111222022 is an apocalyptic number.

211111222022 is a deficient number, since it is larger than the sum of its proper divisors (105555611014).

211111222022 is a wasteful number, since it uses less digits than its factorization.

211111222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105555611013.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211111222022 its reverse (220222111112), we get a palindrome (431333333134).

The spelling of 211111222022 in words is "two hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, twenty-two".