221011323221320 has 64 divisors (see below), whose sum is σ = 524129000238000. Its totient is φ = 83745604819968.

The previous prime is 221011323221281. The next prime is 221011323221333. The reversal of 221011323221320 is 23122323110122.

It can be written as a sum of positive squares in 8 ways, for example, as 112789455176644 + 108221868044676 = 10620238^2 + 10402974^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1797363075 + ... + 1797486034.

Almost surely, 2^{221011323221320} is an apocalyptic number.

221011323221320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221011323221320 is an abundant number, since it is smaller than the sum of its proper divisors (303117677016680).

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

221011323221320 is a wasteful number, since it uses less digits than its factorization.

221011323221320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594849202 (or 3594849198 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 221011323221320 its reverse (23122323110122), we get a palindrome (244133646331442).

The spelling of 221011323221320 in words is "two hundred twenty-one trillion, eleven billion, three hundred twenty-three million, two hundred twenty-one thousand, three hundred twenty".