221210312313 has 8 divisors (see below), whose sum is σ = 295463630176. Its totient is φ = 147215268000.

The previous prime is 221210312273. The next prime is 221210312329. The reversal of 221210312313 is 313213012122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221210312313 - 2⁹ = 221210311801 is a prime.

It is a super-2 number, since 2×221210312313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221210312313.

It is not an unprimeable number, because it can be changed into a prime (221210312333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64566388 + ... + 64569813.

It is an arithmetic number, because the mean of its divisors is an integer number (36932953772).

Almost surely, 2^221210312313 is an apocalyptic number.

It is an amenable number.

221210312313 is a deficient number, since it is larger than the sum of its proper divisors (74253317863).

221210312313 is a wasteful number, since it uses less digits than its factorization.

221210312313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129136775.

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

Adding to 221210312313 its reverse (313213012122), we get a palindrome (534423324435).

The spelling of 221210312313 in words is "two hundred twenty-one billion, two hundred ten million, three hundred twelve thousand, three hundred thirteen".