221002220000020 has 24 divisors (see below), whose sum is σ = 464105027280384. Its totient is φ = 88400818422816.

The previous prime is 221002219999963. The next prime is 221002220000027. The reversal of 221002220000020 is 20000022200122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002220000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27324069 + ... + 34476211.

It is an arithmetic number, because the mean of its divisors is an integer number (19337709470016).

Almost surely, 2^{221002220000020} is an apocalyptic number.

221002220000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002220000020 is an abundant number, since it is smaller than the sum of its proper divisors (243102807280364).

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

221002220000020 is a wasteful number, since it uses less digits than its factorization.

221002220000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8697159 (or 8697157 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 221002220000020 its reverse (20000022200122), we get a palindrome (241002242200142).

The spelling of 221002220000020 in words is "two hundred twenty-one trillion, two billion, two hundred twenty million, twenty", and thus it is an aban number.