220021221102020 has 72 divisors (see below), whose sum is σ = 500325474692736. Its totient is φ = 81237788092032.

The previous prime is 220021221101887. The next prime is 220021221102029. The reversal of 220021221102020 is 20201122120022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 220021221102020.

It is not an unprimeable number, because it can be changed into a prime (220021221102029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413320949 + ... + 413852931.

It is an arithmetic number, because the mean of its divisors is an integer number (6948964926288).

Almost surely, 2^{220021221102020} is an apocalyptic number.

220021221102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220021221102020 is an abundant number, since it is smaller than the sum of its proper divisors (280304253590716).

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

220021221102020 is a wasteful number, since it uses less digits than its factorization.

220021221102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654381 (or 654366 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 220021221102020 its reverse (20201122120022), we get a palindrome (240222343222042).

The spelling of 220021221102020 in words is "two hundred twenty trillion, twenty-one billion, two hundred twenty-one million, one hundred two thousand, twenty".