221031310113 has 16 divisors (see below), whose sum is σ = 330695913600. Its totient is φ = 145895252400.

The previous prime is 221031310061. The next prime is 221031310117. The reversal of 221031310113 is 311013130122.

221031310113 is a `hidden beast` number, since 2 + 210 + 31 + 310 + 113 = 666.

It is not a de Polignac number, because 221031310113 - 2¹³ = 221031301921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221031310117) 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, 40523733 + ... + 40529186.

It is an arithmetic number, because the mean of its divisors is an integer number (20668494600).

Almost surely, 2^221031310113 is an apocalyptic number.

It is an amenable number.

221031310113 is a deficient number, since it is larger than the sum of its proper divisors (109664603487).

221031310113 is a wasteful number, since it uses less digits than its factorization.

221031310113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81053029 (or 81053023 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 221031310113 its reverse (311013130122), we get a palindrome (532044440235).

The spelling of 221031310113 in words is "two hundred twenty-one billion, thirty-one million, three hundred ten thousand, one hundred thirteen".