20221021002220 has 24 divisors (see below), whose sum is σ = 44962034935104. Its totient is φ = 7612619671296.

The previous prime is 20221021002167. The next prime is 20221021002227. The reversal of 20221021002220 is 2220012012202.

It is a junction number, because it is equal to n+sod(n) for n = 20221021002194 and 20221021002203.

It is not an unprimeable number, because it can be changed into a prime (20221021002227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29736795252 + ... + 29736795931.

It is an arithmetic number, because the mean of its divisors is an integer number (1873418122296).

Almost surely, 2^{20221021002220} is an apocalyptic number.

20221021002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20221021002220 is an abundant number, since it is smaller than the sum of its proper divisors (24741013932884).

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

20221021002220 is a wasteful number, since it uses less digits than its factorization.

20221021002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59473591209 (or 59473591207 counting only the distinct ones).

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

Adding to 20221021002220 its reverse (2220012012202), we get a palindrome (22441033014422).

The spelling of 20221021002220 in words is "twenty trillion, two hundred twenty-one billion, twenty-one million, two thousand, two hundred twenty".