221010222020 has 96 divisors (see below), whose sum is σ = 548742974976. Its totient is φ = 73194624000.

The previous prime is 221010221987. The next prime is 221010222023. The reversal of 221010222020 is 20222010122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 221010221986 and 221010222004.

It is not an unprimeable number, because it can be changed into a prime (221010222023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389129 + ... + 770351.

It is an arithmetic number, because the mean of its divisors is an integer number (5716072656).

Almost surely, 2^221010222020 is an apocalyptic number.

221010222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221010222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274371487488).

221010222020 is an abundant number, since it is smaller than the sum of its proper divisors (327732752956).

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

221010222020 is a wasteful number, since it uses less digits than its factorization.

221010222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381381 (or 381379 counting only the distinct ones).

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

Adding to 221010222020 its reverse (20222010122), we get a palindrome (241232232142).

The spelling of 221010222020 in words is "two hundred twenty-one billion, ten million, two hundred twenty-two thousand, twenty".