222021020220 has 96 divisors (see below), whose sum is σ = 636621334272. Its totient is φ = 57782796288.

The previous prime is 222021020213. The next prime is 222021020239. The reversal of 222021020220 is 22020120222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222021020220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3276604 + ... + 3343676.

It is an arithmetic number, because the mean of its divisors is an integer number (6631472232).

Almost surely, 2^222021020220 is an apocalyptic number.

222021020220 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 222021020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318310667136).

222021020220 is an abundant number, since it is smaller than the sum of its proper divisors (414600314052).

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

222021020220 is a wasteful number, since it uses less digits than its factorization.

222021020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68411 (or 68409 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 222021020220 its reverse (22020120222), we get a palindrome (244041140442).

The spelling of 222021020220 in words is "two hundred twenty-two billion, twenty-one million, twenty thousand, two hundred twenty".