221312120200320 has 128 divisors (see below), whose sum is σ = 705436710425280. Its totient is φ = 59016203366400.

The previous prime is 221312120200273. The next prime is 221312120200321. The reversal of 221312120200320 is 23002021213122.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (221312120200321) 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, 489260655 + ... + 489712785.

Almost surely, 2^{221312120200320} is an apocalyptic number.

221312120200320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221312120200320 is an abundant number, since it is smaller than the sum of its proper divisors (484124590224960).

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

221312120200320 is a wasteful number, since it uses less digits than its factorization.

221312120200320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707094 (or 707082 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221312120200320 its reverse (23002021213122), we get a palindrome (244314141413442).

The spelling of 221312120200320 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred twenty million, two hundred thousand, three hundred twenty".