221200221313321 has 32 divisors (see below), whose sum is σ = 237272000329728. Its totient is φ = 205482024618240.

The previous prime is 221200221313307. The next prime is 221200221313327. The reversal of 221200221313321 is 123313122002122.

It is not a de Polignac number, because 221200221313321 - 2³¹ = 221198073829673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221200221313327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7181110506 + ... + 7181141308.

It is an arithmetic number, because the mean of its divisors is an integer number (7414750010304).

Almost surely, 2^{221200221313321} is an apocalyptic number.

It is an amenable number.

221200221313321 is a deficient number, since it is larger than the sum of its proper divisors (16071779016407).

221200221313321 is a wasteful number, since it uses less digits than its factorization.

221200221313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44421.

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

Adding to 221200221313321 its reverse (123313122002122), we get a palindrome (344513343315443).

The spelling of 221200221313321 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty-one million, three hundred thirteen thousand, three hundred twenty-one".