221122030220 has 192 divisors, whose sum is σ = 577612062720. Its totient is φ = 69651189504.

The previous prime is 221122030201. The next prime is 221122030243. The reversal of 221122030220 is 22030221122.

It is a super-2 number, since 2×221122030220² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69819077 + ... + 69822243.

It is an arithmetic number, because the mean of its divisors is an integer number (3008396160).

Almost surely, 2^221122030220 is an apocalyptic number.

221122030220 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 221122030220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288806031360).

221122030220 is an abundant number, since it is smaller than the sum of its proper divisors (356490032500).

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

221122030220 is a wasteful number, since it uses less digits than its factorization.

221122030220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449 (or 3421 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 221122030220 its reverse (22030221122), we get a palindrome (243152251342).

The spelling of 221122030220 in words is "two hundred twenty-one billion, one hundred twenty-two million, thirty thousand, two hundred twenty".