1021112133205 has 4 divisors (see below), whose sum is σ = 1225334559852. Its totient is φ = 816889706560.

The previous prime is 1021112133199. The next prime is 1021112133247. The reversal of 1021112133205 is 5023312111201.

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 166992370609 + 854119762596 = 408647^2 + 924186^2 .

It is not a de Polignac number, because 1021112133205 - 2²¹ = 1021110036053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 102111213316 + ... + 102111213325.

It is an arithmetic number, because the mean of its divisors is an integer number (306333639963).

Almost surely, 2^{1021112133205} is an apocalyptic number.

It is an amenable number.

1021112133205 is a deficient number, since it is larger than the sum of its proper divisors (204222426647).

1021112133205 is an equidigital number, since it uses as much as digits as its factorization.

1021112133205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204222426646.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 1021112133205 its reverse (5023312111201), we get a palindrome (6044424244406).

The spelling of 1021112133205 in words is "one trillion, twenty-one billion, one hundred twelve million, one hundred thirty-three thousand, two hundred five".