20130212133 has 6 divisors (see below), whose sum is σ = 29076973094.
Its totient is φ = 13420141416.
The previous prime is 20130212129. The next prime is 20130212161. The reversal of 20130212133 is 33121203102.
Adding to 20130212133 its reverse (33121203102), we get a palindrome (53251415235).
It can be written as a sum of positive squares in only one way, i.e., 11109581604 + 9020630529 = 105402^2 + 94977^2
It is not a de Polignac number, because 20130212133 - 22 = 20130212129 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 (20130212833) 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 5 ways as a sum of consecutive naturals, for example, 1118345110 + ... + 1118345127.
Almost surely, 220130212133 is an apocalyptic number.
It is an amenable number.
20130212133 is a deficient number, since it is larger than the sum of its proper divisors (8946760961).
20130212133 is a wasteful number, since it uses less digits than its factorization.
20130212133 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2236690243 (or 2236690240 counting only the distinct ones).
The product of its (nonzero) digits is 216, while the sum is 18.
The spelling of 20130212133 in words is "twenty billion, one hundred thirty million, two hundred twelve thousand, one hundred thirty-three".