221021122113 has 12 divisors (see below), whose sum is σ = 348275707728. Its totient is φ = 133952195160.

The previous prime is 221021122079. The next prime is 221021122129. The reversal of 221021122113 is 311221120122.

221021122113 is a `hidden beast` number, since 221 + 0 + 211 + 221 + 13 = 666.

It is not a de Polignac number, because 221021122113 - 2¹⁴ = 221021105729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021162113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1116268195 + ... + 1116268392.

It is an arithmetic number, because the mean of its divisors is an integer number (29022975644).

Almost surely, 2^221021122113 is an apocalyptic number.

It is an amenable number.

221021122113 is a deficient number, since it is larger than the sum of its proper divisors (127254585615).

221021122113 is a wasteful number, since it uses less digits than its factorization.

221021122113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232536604 (or 2232536601 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 221021122113 its reverse (311221120122), we get a palindrome (532242242235).

The spelling of 221021122113 in words is "two hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, one hundred thirteen".