221320231310 has 16 divisors (see below), whose sum is σ = 398404116000. Its totient is φ = 88521937056.

The previous prime is 221320231259. The next prime is 221320231337. The reversal of 221320231310 is 13132023122.

221320231310 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221320231310² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616985 + ... + 907364.

It is an arithmetic number, because the mean of its divisors is an integer number (24900257250).

Almost surely, 2^221320231310 is an apocalyptic number.

221320231310 is a deficient number, since it is larger than the sum of its proper divisors (177083884690).

221320231310 is a wasteful number, since it uses less digits than its factorization.

221320231310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538875.

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

Adding to 221320231310 its reverse (13132023122), we get a palindrome (234452254432).

The spelling of 221320231310 in words is "two hundred twenty-one billion, three hundred twenty million, two hundred thirty-one thousand, three hundred ten".