20122212118 has 4 divisors (see below), whose sum is σ = 30183318180. Its totient is φ = 10061106058.

The previous prime is 20122212079. The next prime is 20122212151. The reversal of 20122212118 is 81121222102.

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

It is a congruent number.

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, 5030553028 + ... + 5030553031.

It is an arithmetic number, because the mean of its divisors is an integer number (7545829545).

Almost surely, 2^20122212118 is an apocalyptic number.

20122212118 is a deficient number, since it is larger than the sum of its proper divisors (10061106062).

20122212118 is a wasteful number, since it uses less digits than its factorization.

20122212118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10061106061.

The product of its (nonzero) digits is 256, while the sum is 22.

The spelling of 20122212118 in words is "twenty billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eighteen".