221313300121 has 4 divisors (see below), whose sum is σ = 221551528500. Its totient is φ = 221075071744.

The previous prime is 221313300101. The next prime is 221313300127. The reversal of 221313300121 is 121003313122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6369795721 + 214943504400 = 79811^2 + 463620^2 .

It is a cyclic number.

It is not a de Polignac number, because 221313300121 - 2²⁷ = 221179082393 is a prime.

It is a super-2 number, since 2×221313300121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221313300127) 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, 119112796 + ... + 119114653.

It is an arithmetic number, because the mean of its divisors is an integer number (55387882125).

Almost surely, 2^221313300121 is an apocalyptic number.

It is an amenable number.

221313300121 is a deficient number, since it is larger than the sum of its proper divisors (238228379).

221313300121 is an equidigital number, since it uses as much as digits as its factorization.

221313300121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238228378.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221313300121 its reverse (121003313122), we get a palindrome (342316613243).

The spelling of 221313300121 in words is "two hundred twenty-one billion, three hundred thirteen million, three hundred thousand, one hundred twenty-one".