20111210122222 has 4 divisors (see below), whose sum is σ = 30166815183336. Its totient is φ = 10055605061110.

The previous prime is 20111210122169. The next prime is 20111210122243. The reversal of 20111210122222 is 22222101211102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20111210122222.

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, 5027802530554 + ... + 5027802530557.

It is an arithmetic number, because the mean of its divisors is an integer number (7541703795834).

Almost surely, 2^{20111210122222} is an apocalyptic number.

20111210122222 is a deficient number, since it is larger than the sum of its proper divisors (10055605061114).

20111210122222 is a wasteful number, since it uses less digits than its factorization.

20111210122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055605061113.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20111210122222 its reverse (22222101211102), we get a palindrome (42333311333324).

The spelling of 20111210122222 in words is "twenty trillion, one hundred eleven billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty-two".