221113102321121 has 8 divisors (see below), whose sum is σ = 234121944930984. Its totient is φ = 208104502992640.

The previous prime is 221113102321079. The next prime is 221113102321141. The reversal of 221113102321121 is 121123201311122.

It can be written as a sum of positive squares in 4 ways, for example, as 24010147000225 + 197102955320896 = 4900015^2 + 14039336^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221113102321121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221113102321141) 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, 58947470 + ... + 62586183.

It is an arithmetic number, because the mean of its divisors is an integer number (29265243116373).

Almost surely, 2^{221113102321121} is an apocalyptic number.

It is an amenable number.

221113102321121 is a deficient number, since it is larger than the sum of its proper divisors (13008842609863).

221113102321121 is a wasteful number, since it uses less digits than its factorization.

221113102321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121640691.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 221113102321121 its reverse (121123201311122), we get a palindrome (342236303632243).

The spelling of 221113102321121 in words is "two hundred twenty-one trillion, one hundred thirteen billion, one hundred two million, three hundred twenty-one thousand, one hundred twenty-one".