20111312222 has 8 divisors (see below), whose sum is σ = 31941495936. Its totient is φ = 9464146912.

The previous prime is 20111312219. The next prime is 20111312237. The reversal of 20111312222 is 22221311102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 20111312222.

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 in 3 ways as a sum of consecutive naturals, for example, 295754558 + ... + 295754625.

It is an arithmetic number, because the mean of its divisors is an integer number (3992686992).

Almost surely, 2^20111312222 is an apocalyptic number.

20111312222 is a deficient number, since it is larger than the sum of its proper divisors (11830183714).

20111312222 is a wasteful number, since it uses less digits than its factorization.

20111312222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591509202.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20111312222 its reverse (22221311102), we get a palindrome (42332623324).

The spelling of 20111312222 in words is "twenty billion, one hundred eleven million, three hundred twelve thousand, two hundred twenty-two".