221351012320 has 96 divisors (see below), whose sum is σ = 559489502880. Its totient is φ = 82505226240.

The previous prime is 221351012249. The next prime is 221351012327. The reversal of 221351012320 is 23210153122.

It is a junction number, because it is equal to n+sod(n) for n = 221351012291 and 221351012300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221351012327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 411387 + ... + 782266.

It is an arithmetic number, because the mean of its divisors is an integer number (5828015655).

Almost surely, 2^221351012320 is an apocalyptic number.

221351012320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221351012320 is an abundant number, since it is smaller than the sum of its proper divisors (338138490560).

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

221351012320 is a wasteful number, since it uses less digits than its factorization.

221351012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193748 (or 1193740 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 221351012320 its reverse (23210153122), we get a palindrome (244561165442).

The spelling of 221351012320 in words is "two hundred twenty-one billion, three hundred fifty-one million, twelve thousand, three hundred twenty".