201111222122 has 4 divisors (see below), whose sum is σ = 301666833186. Its totient is φ = 100555611060.

The previous prime is 201111222121. The next prime is 201111222127. The reversal of 201111222122 is 221222111102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221222111102 = 2 ⋅110611055551.

It can be written as a sum of positive squares in only one way, i.e., 128809927801 + 72301294321 = 358901^2 + 268889^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201111222122.

It is not an unprimeable number, because it can be changed into a prime (201111222121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50277805529 + ... + 50277805532.

Almost surely, 2^201111222122 is an apocalyptic number.

201111222122 is a deficient number, since it is larger than the sum of its proper divisors (100555611064).

201111222122 is a wasteful number, since it uses less digits than its factorization.

201111222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100555611063.

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

Adding to 201111222122 its reverse (221222111102), we get a palindrome (422333333224).

The spelling of 201111222122 in words is "two hundred one billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty-two".