20112222220220 has 48 divisors (see below), whose sum is σ = 45500564561760. Its totient is φ = 7423438960896.

The previous prime is 20112222220193. The next prime is 20112222220261. The reversal of 20112222220220 is 2202222221102.

It is a super-2 number, since 2×20112222220220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20112222220192 and 20112222220201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12865235 + ... + 14343594.

It is an arithmetic number, because the mean of its divisors is an integer number (947928428370).

Almost surely, 2^{20112222220220} is an apocalyptic number.

20112222220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112222220220 is an abundant number, since it is smaller than the sum of its proper divisors (25388342341540).

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

20112222220220 is a wasteful number, since it uses less digits than its factorization.

20112222220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27211694 (or 27211692 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20112222220220 its reverse (2202222221102), we get a palindrome (22314444441322).

The spelling of 20112222220220 in words is "twenty trillion, one hundred twelve billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty".