221320213310 has 32 divisors (see below), whose sum is σ = 475082399232. Its totient is φ = 72582032160.

The previous prime is 221320213253. The next prime is 221320213349. The reversal of 221320213310 is 13312023122.

It is a super-2 number, since 2×221320213310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68731376 + ... + 68734595.

It is an arithmetic number, because the mean of its divisors is an integer number (14846324976).

Almost surely, 2^221320213310 is an apocalyptic number.

221320213310 is an abundant number, since it is smaller than the sum of its proper divisors (253762185922).

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

221320213310 is a wasteful number, since it uses less digits than its factorization.

221320213310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137466008.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221320213310 its reverse (13312023122), we get a palindrome (234632236432).

The spelling of 221320213310 in words is "two hundred twenty-one billion, three hundred twenty million, two hundred thirteen thousand, three hundred ten".