20021102002220 has 24 divisors (see below), whose sum is σ = 45866524587408. Its totient is φ = 7280400728000.

The previous prime is 20021102002193. The next prime is 20021102002241. The reversal of 20021102002220 is 2220020112002.

It is a junction number, because it is equal to n+sod(n) for n = 20021102002195 and 20021102002204.

It is an unprimeable number.

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, 45502504331 + ... + 45502504770.

It is an arithmetic number, because the mean of its divisors is an integer number (1911105191142).

Almost surely, 2^{20021102002220} is an apocalyptic number.

20021102002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021102002220 is an abundant number, since it is smaller than the sum of its proper divisors (25845422585188).

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

20021102002220 is a wasteful number, since it uses less digits than its factorization.

20021102002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91005009121 (or 91005009119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20021102002220 its reverse (2220020112002), we get a palindrome (22241122114222).

The spelling of 20021102002220 in words is "twenty trillion, twenty-one billion, one hundred two million, two thousand, two hundred twenty".