211111021122202 has 4 divisors (see below), whose sum is σ = 316666531683306. Its totient is φ = 105555510561100.

The previous prime is 211111021122163. The next prime is 211111021122247. The reversal of 211111021122202 is 202221120111112.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 209633651370361 + 1477369751841 = 14478731^2 + 1215471^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211111021122202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52777755280549 + ... + 52777755280552.

Almost surely, 2^{211111021122202} is an apocalyptic number.

211111021122202 is a deficient number, since it is larger than the sum of its proper divisors (105555510561104).

211111021122202 is a wasteful number, since it uses less digits than its factorization.

211111021122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105555510561103.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211111021122202 its reverse (202221120111112), we get a palindrome (413332141233314).

The spelling of 211111021122202 in words is "two hundred eleven trillion, one hundred eleven billion, twenty-one million, one hundred twenty-two thousand, two hundred two".