221403234344113 has 4 divisors (see below), whose sum is σ = 221403540912880. Its totient is φ = 221402927775348.

The previous prime is 221403234344069. The next prime is 221403234344179. The reversal of 221403234344113 is 311443432304122.

221403234344113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221403234344113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221403234344183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152198523 + ... + 153646336.

It is an arithmetic number, because the mean of its divisors is an integer number (55350885228220).

Almost surely, 2^{221403234344113} is an apocalyptic number.

It is an amenable number.

221403234344113 is a deficient number, since it is larger than the sum of its proper divisors (306568767).

221403234344113 is an equidigital number, since it uses as much as digits as its factorization.

221403234344113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306568766.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 221403234344113 its reverse (311443432304122), we get a palindrome (532846666648235).

The spelling of 221403234344113 in words is "two hundred twenty-one trillion, four hundred three billion, two hundred thirty-four million, three hundred forty-four thousand, one hundred thirteen".