20121013133 has 8 divisors (see below), whose sum is σ = 21826951608. Its totient is φ = 18437670144.

The previous prime is 20121013117. The next prime is 20121013147. The reversal of 20121013133 is 33131012102.

It can be written as a sum of positive squares in 4 ways, for example, as 1880349769 + 18240663364 = 43363^2 + 135058^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121013133 - 2⁴ = 20121013117 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 (20121013163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5647016 + ... + 5650577.

It is an arithmetic number, because the mean of its divisors is an integer number (2728368951).

Almost surely, 2^20121013133 is an apocalyptic number.

It is an amenable number.

20121013133 is a deficient number, since it is larger than the sum of its proper divisors (1705938475).

20121013133 is a wasteful number, since it uses less digits than its factorization.

20121013133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11297743.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20121013133 its reverse (33131012102), we get a palindrome (53252025235).

The spelling of 20121013133 in words is "twenty billion, one hundred twenty-one million, thirteen thousand, one hundred thirty-three".