10555331112121 has 4 divisors (see below), whose sum is σ = 10555461504244. Its totient is φ = 10555200720000.

The previous prime is 10555331112061. The next prime is 10555331112169. The reversal of 10555331112121 is 12121113355501.

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 5361540250000 + 5193790862121 = 2315500^2 + 2278989^2 .

It is a cyclic number.

It is not a de Polignac number, because 10555331112121 - 2¹¹ = 10555331110073 is a prime.

It is a super-2 number, since 2×10555331112121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10555331112191) 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, 65074560 + ... + 65236561.

It is an arithmetic number, because the mean of its divisors is an integer number (2638865376061).

Almost surely, 2^{10555331112121} is an apocalyptic number.

It is an amenable number.

10555331112121 is a deficient number, since it is larger than the sum of its proper divisors (130392123).

10555331112121 is an equidigital number, since it uses as much as digits as its factorization.

10555331112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130392122.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 10555331112121 its reverse (12121113355501), we get a palindrome (22676444467622).

The spelling of 10555331112121 in words is "ten trillion, five hundred fifty-five billion, three hundred thirty-one million, one hundred twelve thousand, one hundred twenty-one".