221010212220220 has 24 divisors (see below), whose sum is σ = 464137762161024. Its totient is φ = 88400976983616.

The previous prime is 221010212220169. The next prime is 221010212220223. The reversal of 221010212220220 is 22022212010122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221010212220223) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 193660867 + ... + 194798746.

It is an arithmetic number, because the mean of its divisors is an integer number (19339073423376).

Almost surely, 2^{221010212220220} is an apocalyptic number.

221010212220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221010212220220 is an abundant number, since it is smaller than the sum of its proper divisors (243127549940804).

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

221010212220220 is a wasteful number, since it uses less digits than its factorization.

221010212220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388488069 (or 388488067 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221010212220220 its reverse (22022212010122), we get a palindrome (243032424230342).

The spelling of 221010212220220 in words is "two hundred twenty-one trillion, ten billion, two hundred twelve million, two hundred twenty thousand, two hundred twenty".