221210522020 has 24 divisors (see below), whose sum is σ = 465167352384. Its totient is φ = 88365112416.

The previous prime is 221210522003. The next prime is 221210522023. The reversal of 221210522020 is 20225012122.

It is a super-3 number, since 3×221210522020³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (221210522023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7428294 + ... + 7458013.

It is an arithmetic number, because the mean of its divisors is an integer number (19381973016).

Almost surely, 2^221210522020 is an apocalyptic number.

221210522020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210522020 is an abundant number, since it is smaller than the sum of its proper divisors (243956830364).

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

221210522020 is a wasteful number, since it uses less digits than its factorization.

221210522020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14887059 (or 14887057 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 221210522020 its reverse (20225012122), we get a palindrome (241435534142).

The spelling of 221210522020 in words is "two hundred twenty-one billion, two hundred ten million, five hundred twenty-two thousand, twenty".