121310111300221 has 24 divisors (see below), whose sum is σ = 134954065751040. Its totient is φ = 108815863740672.

The previous prime is 121310111300207. The next prime is 121310111300227. The reversal of 121310111300221 is 122003111013121.

It is not a de Polignac number, because 121310111300221 - 2¹⁹ = 121310110775933 is a prime.

It is a super-2 number, since 2×121310111300221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121310111300227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31101661 + ... + 34784098.

It is an arithmetic number, because the mean of its divisors is an integer number (5623086072960).

Almost surely, 2^{121310111300221} is an apocalyptic number.

It is an amenable number.

121310111300221 is a deficient number, since it is larger than the sum of its proper divisors (13643954450819).

121310111300221 is a wasteful number, since it uses less digits than its factorization.

121310111300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65886093 (or 65886076 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 121310111300221 its reverse (122003111013121), we get a palindrome (243313222313342).

The spelling of 121310111300221 in words is "one hundred twenty-one trillion, three hundred ten billion, one hundred eleven million, three hundred thousand, two hundred twenty-one".