22121210120020 has 24 divisors (see below), whose sum is σ = 50677681366368. Its totient is φ = 8044076407200.

The previous prime is 22121210119993. The next prime is 22121210120063. The reversal of 22121210120020 is 2002101212122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22121210119976 and 22121210120003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50275477326 + ... + 50275477765.

It is an arithmetic number, because the mean of its divisors is an integer number (2111570056932).

Almost surely, 2^{22121210120020} is an apocalyptic number.

22121210120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121210120020 is an abundant number, since it is smaller than the sum of its proper divisors (28556471246348).

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

22121210120020 is a wasteful number, since it uses less digits than its factorization.

22121210120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100550955111 (or 100550955109 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22121210120020 its reverse (2002101212122), we get a palindrome (24123311332142).

The spelling of 22121210120020 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty thousand, twenty".