221221113113 has 32 divisors (see below), whose sum is σ = 297634713600. Its totient is φ = 158792996160.

The previous prime is 221221113103. The next prime is 221221113119. The reversal of 221221113113 is 311311122122.

It is a cyclic number.

It is not a de Polignac number, because 221221113113 - 2¹⁶ = 221221047577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221221113119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260588 + ... + 714386.

It is an arithmetic number, because the mean of its divisors is an integer number (9301084800).

Almost surely, 2^221221113113 is an apocalyptic number.

It is an amenable number.

221221113113 is a deficient number, since it is larger than the sum of its proper divisors (76413600487).

221221113113 is a wasteful number, since it uses less digits than its factorization.

221221113113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454317.

The product of its digits is 144, while the sum is 20.

Adding to 221221113113 its reverse (311311122122), we get a palindrome (532532235235).

Subtracting 221221113113 from its reverse (311311122122), we obtain a palindrome (90090009009).

The spelling of 221221113113 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, one hundred thirteen".