115554312411221 has 4 divisors (see below), whose sum is σ = 116222256413772. Its totient is φ = 114886368408672.

The previous prime is 115554312411217. The next prime is 115554312411227. The reversal of 115554312411221 is 122114213455511.

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 74054819571121 + 41499492840100 = 8605511^2 + 6442010^2 .

It is a cyclic number.

It is not a de Polignac number, because 115554312411221 - 2² = 115554312411217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115554312411227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333972001016 + ... + 333972001361.

It is an arithmetic number, because the mean of its divisors is an integer number (29055564103443).

Almost surely, 2^{115554312411221} is an apocalyptic number.

It is an amenable number.

115554312411221 is a deficient number, since it is larger than the sum of its proper divisors (667944002551).

115554312411221 is an equidigital number, since it uses as much as digits as its factorization.

115554312411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667944002550.

The product of its digits is 48000, while the sum is 38.

Adding to 115554312411221 its reverse (122114213455511), we get a palindrome (237668525866732).

The spelling of 115554312411221 in words is "one hundred fifteen trillion, five hundred fifty-four billion, three hundred twelve million, four hundred eleven thousand, two hundred twenty-one".