221403113121 has 8 divisors (see below), whose sum is σ = 298760827680. Its totient is φ = 145823736992.

The previous prime is 221403113069. The next prime is 221403113149. The reversal of 221403113121 is 121311304122.

221403113121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 221403113121 - 2¹⁰ = 221403112097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221403113021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444584316 + ... + 444584813.

It is an arithmetic number, because the mean of its divisors is an integer number (37345103460).

Almost surely, 2^221403113121 is an apocalyptic number.

It is an amenable number.

221403113121 is a deficient number, since it is larger than the sum of its proper divisors (77357714559).

221403113121 is an equidigital number, since it uses as much as digits as its factorization.

221403113121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889169215.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 221403113121 its reverse (121311304122), we get a palindrome (342714417243).

The spelling of 221403113121 in words is "two hundred twenty-one billion, four hundred three million, one hundred thirteen thousand, one hundred twenty-one".