221210021120220 has 144 divisors (see below), whose sum is σ = 735796838361312. Its totient is φ = 53348813291520.

The previous prime is 221210021120171. The next prime is 221210021120251. The reversal of 221210021120220 is 22021120012122.

It is a happy number.

221210021120220 is a `hidden beast` number, since 2 + 2 + 1 + 210 + 0 + 211 + 20 + 220 = 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 = 221210021120193 and 221210021120202.

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 47 ways as a sum of consecutive naturals, for example, 289053697 + ... + 289817976.

It is an arithmetic number, because the mean of its divisors is an integer number (5109700266398).

Almost surely, 2^{221210021120220} is an apocalyptic number.

221210021120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210021120220 is an abundant number, since it is smaller than the sum of its proper divisors (514586817241092).

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

221210021120220 is a wasteful number, since it uses less digits than its factorization.

221210021120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578871892 (or 578871887 counting only the distinct ones).

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

Adding to 221210021120220 its reverse (22021120012122), we get a palindrome (243231141132342).

The spelling of 221210021120220 in words is "two hundred twenty-one trillion, two hundred ten billion, twenty-one million, one hundred twenty thousand, two hundred twenty".