221322022220 has 96 divisors (see below), whose sum is σ = 502271255808. Its totient is φ = 81434932992.

The previous prime is 221322022219. The next prime is 221322022231. The reversal of 221322022220 is 22220223122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221322022192 and 221322022201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132765827 + ... + 132767493.

It is an arithmetic number, because the mean of its divisors is an integer number (5231992248).

Almost surely, 2^221322022220 is an apocalyptic number.

221322022220 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 221322022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251135627904).

221322022220 is an abundant number, since it is smaller than the sum of its proper divisors (280949233588).

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

221322022220 is a wasteful number, since it uses less digits than its factorization.

221322022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159 (or 3157 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 221322022220 its reverse (22220223122), we get a palindrome (243542245342).

The spelling of 221322022220 in words is "two hundred twenty-one billion, three hundred twenty-two million, twenty-two thousand, two hundred twenty".