221312314121 has 8 divisors (see below), whose sum is σ = 230950950720. Its totient is φ = 211675041072.

The previous prime is 221312314081. The next prime is 221312314183. The reversal of 221312314121 is 121413213122.

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 221312314121 - 2⁶ = 221312314057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221312314721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2030 + ... + 665303.

It is an arithmetic number, because the mean of its divisors is an integer number (28868868840).

Almost surely, 2^221312314121 is an apocalyptic number.

It is an amenable number.

221312314121 is a deficient number, since it is larger than the sum of its proper divisors (9638636599).

221312314121 is a wasteful number, since it uses less digits than its factorization.

221312314121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681775.

The product of its digits is 576, while the sum is 23.

Adding to 221312314121 its reverse (121413213122), we get a palindrome (342725527243).

The spelling of 221312314121 in words is "two hundred twenty-one billion, three hundred twelve million, three hundred fourteen thousand, one hundred twenty-one".