20021011110220 has 24 divisors (see below), whose sum is σ = 43021893643344. Its totient is φ = 7822162479936.

The previous prime is 20021011110211. The next prime is 20021011110259. The reversal of 20021011110220 is 2201111012002.

It is a self number, because there is not a number n which added to its sum of digits gives 20021011110220.

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, 11640121879 + ... + 11640123598.

It is an arithmetic number, because the mean of its divisors is an integer number (1792578901806).

Almost surely, 2^{20021011110220} is an apocalyptic number.

20021011110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021011110220 is an abundant number, since it is smaller than the sum of its proper divisors (23000882533124).

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

20021011110220 is a wasteful number, since it uses less digits than its factorization.

20021011110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23280245529 (or 23280245527 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20021011110220 its reverse (2201111012002), we get a palindrome (22222122122222).

The spelling of 20021011110220 in words is "twenty trillion, twenty-one billion, eleven million, one hundred ten thousand, two hundred twenty".