20312122222 has 32 divisors (see below), whose sum is σ = 35724499200. Its totient is φ = 8481879168.

The previous prime is 20312122213. The next prime is 20312122241. The reversal of 20312122222 is 22222121302.

It is a super-2 number, since 2×20312122222² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20312122222.

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 15 ways as a sum of consecutive naturals, for example, 15472 + ... + 202147.

It is an arithmetic number, because the mean of its divisors is an integer number (1116390600).

Almost surely, 2^20312122222 is an apocalyptic number.

20312122222 is a deficient number, since it is larger than the sum of its proper divisors (15412376978).

20312122222 is a wasteful number, since it uses less digits than its factorization.

20312122222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217800.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20312122222 its reverse (22222121302), we get a palindrome (42534243524).

The spelling of 20312122222 in words is "twenty billion, three hundred twelve million, one hundred twenty-two thousand, two hundred twenty-two".