20121013333 has 4 divisors (see below), whose sum is σ = 20500655148. Its totient is φ = 19741371520.

The previous prime is 20121013331. The next prime is 20121013337. The reversal of 20121013333 is 33331012102.

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 10770703524 + 9350309809 = 103782^2 + 96697^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121013333 - 2¹ = 20121013331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121013333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121013331) 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, 189820828 + ... + 189820933.

It is an arithmetic number, because the mean of its divisors is an integer number (5125163787).

Almost surely, 2^20121013333 is an apocalyptic number.

It is an amenable number.

20121013333 is a deficient number, since it is larger than the sum of its proper divisors (379641815).

20121013333 is an equidigital number, since it uses as much as digits as its factorization.

20121013333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379641814.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20121013333 its reverse (33331012102), we get a palindrome (53452025435).

The spelling of 20121013333 in words is "twenty billion, one hundred twenty-one million, thirteen thousand, three hundred thirty-three".