20121300133 has 4 divisors (see below), whose sum is σ = 21950509248. Its totient is φ = 18292091020.

The previous prime is 20121300131. The next prime is 20121300137. The reversal of 20121300133 is 33100312102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20121300133 - 2¹ = 20121300131 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 (20121300131) 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, 914604541 + ... + 914604562.

It is an arithmetic number, because the mean of its divisors is an integer number (5487627312).

Almost surely, 2^20121300133 is an apocalyptic number.

It is an amenable number.

20121300133 is a deficient number, since it is larger than the sum of its proper divisors (1829209115).

20121300133 is a wasteful number, since it uses less digits than its factorization.

20121300133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1829209114.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20121300133 its reverse (33100312102), we get a palindrome (53221612235).

The spelling of 20121300133 in words is "twenty billion, one hundred twenty-one million, three hundred thousand, one hundred thirty-three".