221313000121 has 4 divisors (see below), whose sum is σ = 222670748752. Its totient is φ = 219955251492.

The previous prime is 221313000113. The next prime is 221313000149. The reversal of 221313000121 is 121000313122.

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 not a de Polignac number, because 221313000121 - 2³ = 221313000113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221313000095 and 221313000104.

It is not an unprimeable number, because it can be changed into a prime (221313000721) 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, 678874071 + ... + 678874396.

It is an arithmetic number, because the mean of its divisors is an integer number (55667687188).

Almost surely, 2^221313000121 is an apocalyptic number.

It is an amenable number.

221313000121 is a deficient number, since it is larger than the sum of its proper divisors (1357748631).

221313000121 is a wasteful number, since it uses less digits than its factorization.

221313000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357748630.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221313000121 its reverse (121000313122), we get a palindrome (342313313243).

The spelling of 221313000121 in words is "two hundred twenty-one billion, three hundred thirteen million, one hundred twenty-one", and thus it is an aban number.