221320213311 has 16 divisors (see below), whose sum is σ = 296792496000. Its totient is φ = 146699809248.

The previous prime is 221320213253. The next prime is 221320213349. The reversal of 221320213311 is 113312023122.

It is not a de Polignac number, because 221320213311 - 2⁷ = 221320213183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221320213211) 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, 58720 + ... + 667898.

It is an arithmetic number, because the mean of its divisors is an integer number (18549531000).

Almost surely, 2^221320213311 is an apocalyptic number.

221320213311 is a deficient number, since it is larger than the sum of its proper divisors (75472282689).

221320213311 is a wasteful number, since it uses less digits than its factorization.

221320213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609878.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221320213311 its reverse (113312023122), we get a palindrome (334632236433).

The spelling of 221320213311 in words is "two hundred twenty-one billion, three hundred twenty million, two hundred thirteen thousand, three hundred eleven".