221322332020 has 12 divisors (see below), whose sum is σ = 464776897284. Its totient is φ = 88528932800.

The previous prime is 221322332003. The next prime is 221322332057. The reversal of 221322332020 is 20233223122.

It can be written as a sum of positive squares in 2 ways, for example, as 128182616676 + 93139715344 = 358026^2 + 305188^2 .

It is a super-2 number, since 2×221322332020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221322331982 and 221322332000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5533058281 + ... + 5533058320.

It is an arithmetic number, because the mean of its divisors is an integer number (38731408107).

Almost surely, 2^221322332020 is an apocalyptic number.

221322332020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221322332020 is an abundant number, since it is smaller than the sum of its proper divisors (243454565264).

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

221322332020 is a wasteful number, since it uses less digits than its factorization.

221322332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066116610 (or 11066116608 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 221322332020 its reverse (20233223122), we get a palindrome (241555555142).

The spelling of 221322332020 in words is "two hundred twenty-one billion, three hundred twenty-two million, three hundred thirty-two thousand, twenty".