221002020201220 has 24 divisors (see below), whose sum is σ = 464413851720000. Its totient is φ = 88341834880992.

The previous prime is 221002020201169. The next prime is 221002020201293. The reversal of 221002020201220 is 22102020200122.

It is a junction number, because it is equal to n+sod(n) for n = 221002020201194 and 221002020201203.

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, 3685794240 + ... + 3685854199.

It is an arithmetic number, because the mean of its divisors is an integer number (19350577155000).

Almost surely, 2^{221002020201220} is an apocalyptic number.

221002020201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002020201220 is an abundant number, since it is smaller than the sum of its proper divisors (243411831518780).

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

221002020201220 is a wasteful number, since it uses less digits than its factorization.

221002020201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7371649947 (or 7371649945 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221002020201220 its reverse (22102020200122), we get a palindrome (243104040401342).

The spelling of 221002020201220 in words is "two hundred twenty-one trillion, two billion, twenty million, two hundred one thousand, two hundred twenty".