22121002220220 has 36 divisors (see below), whose sum is σ = 67100373401880. Its totient is φ = 5898933925344.

The previous prime is 22121002220209. The next prime is 22121002220287. The reversal of 22121002220220 is 2202220012122.

22121002220220 is a `hidden beast` number, since 2 + 212 + 10 + 0 + 2 + 220 + 220 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 22121002220193 and 22121002220202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61447228210 + ... + 61447228569.

Almost surely, 2^{22121002220220} is an apocalyptic number.

22121002220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121002220220 is an abundant number, since it is smaller than the sum of its proper divisors (44979371181660).

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

22121002220220 is a wasteful number, since it uses less digits than its factorization.

22121002220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122894456794 (or 122894456789 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22121002220220 its reverse (2202220012122), we get a palindrome (24323222232342).

The spelling of 22121002220220 in words is "twenty-two trillion, one hundred twenty-one billion, two million, two hundred twenty thousand, two hundred twenty".