10121221133 has 4 divisors (see below), whose sum is σ = 10716587100. Its totient is φ = 9525855168.

The previous prime is 10121221111. The next prime is 10121221147. The reversal of 10121221133 is 33112212101.

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 9211776484 + 909444649 = 95978^2 + 30157^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121221133 - 2⁸ = 10121220877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 595365949 = 10121221133 / (1 + 0 + 1 + 2 + 1 + 2 + 2 + 1 + 1 + 3 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121220133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297682958 + ... + 297682991.

It is an arithmetic number, because the mean of its divisors is an integer number (2679146775).

Almost surely, 2^10121221133 is an apocalyptic number.

It is an amenable number.

10121221133 is a deficient number, since it is larger than the sum of its proper divisors (595365967).

10121221133 is an equidigital number, since it uses as much as digits as its factorization.

10121221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595365966.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 10121221133 its reverse (33112212101), we get a palindrome (43233433234).

The spelling of 10121221133 in words is "ten billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-three".