221210120012020 has 24 divisors (see below), whose sum is σ = 464594167447200. Its totient is φ = 88473968876832.

The previous prime is 221210120011997. The next prime is 221210120012071. The reversal of 221210120012020 is 20210021012122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221210120011985 and 221210120012003.

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, 629765530 + ... + 630116689.

It is an arithmetic number, because the mean of its divisors is an integer number (19358090310300).

Almost surely, 2^{221210120012020} is an apocalyptic number.

221210120012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210120012020 is an abundant number, since it is smaller than the sum of its proper divisors (243384047435180).

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

221210120012020 is a wasteful number, since it uses less digits than its factorization.

221210120012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259891007 (or 1259891005 counting only the distinct ones).

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

Adding to 221210120012020 its reverse (20210021012122), we get a palindrome (241420141024142).

The spelling of 221210120012020 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twenty million, twelve thousand, twenty".