20112220101222 has 32 divisors (see below), whose sum is σ = 45232302245760. Its totient is φ = 6623301397320.

The previous prime is 20112220101209. The next prime is 20112220101241. The reversal of 20112220101222 is 22210102221102.

It is a happy number.

20112220101222 is a `hidden beast` number, since 201 + 12 + 220 + 10 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20112220101195 and 20112220101204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2243661304 + ... + 2243670267.

It is an arithmetic number, because the mean of its divisors is an integer number (1413509445180).

Almost surely, 2^{20112220101222} is an apocalyptic number.

20112220101222 is an abundant number, since it is smaller than the sum of its proper divisors (25120082144538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20112220101222 is a wasteful number, since it uses less digits than its factorization.

20112220101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4487331665 (or 4487331659 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20112220101222 its reverse (22210102221102), we get a palindrome (42322322322324).

The spelling of 20112220101222 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, one hundred one thousand, two hundred twenty-two".