221300310121 has 4 divisors (see below), whose sum is σ = 241418520144. Its totient is φ = 201182100100.

The previous prime is 221300310113. The next prime is 221300310149. The reversal of 221300310121 is 121013003122.

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 221300310121 - 2³ = 221300310113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221300310095 and 221300310104.

It is not an unprimeable number, because it can be changed into a prime (221300350121) 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, 10059104995 + ... + 10059105016.

It is an arithmetic number, because the mean of its divisors is an integer number (60354630036).

Almost surely, 2^221300310121 is an apocalyptic number.

It is an amenable number.

221300310121 is a deficient number, since it is larger than the sum of its proper divisors (20118210023).

221300310121 is a wasteful number, since it uses less digits than its factorization.

221300310121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20118210022.

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

Adding to 221300310121 its reverse (121013003122), we get a palindrome (342313313243).

It can be divided in two parts, 2213003101 and 21, that added together give a palindrome (2213003122).

The spelling of 221300310121 in words is "two hundred twenty-one billion, three hundred million, three hundred ten thousand, one hundred twenty-one".