20131130212 has 12 divisors (see below), whose sum is σ = 35552684860. Its totient is φ = 9973220256.

The previous prime is 20131130209. The next prime is 20131130219. The reversal of 20131130212 is 21203113102.

It can be written as a sum of positive squares in 2 ways, for example, as 17973156096 + 2157974116 = 134064^2 + 46454^2 .

It is a super-2 number, since 2×20131130212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20131130219) 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 3 ways as a sum of consecutive naturals, for example, 23085723 + ... + 23086594.

Almost surely, 2^20131130212 is an apocalyptic number.

It is an amenable number.

20131130212 is a deficient number, since it is larger than the sum of its proper divisors (15421554648).

20131130212 is a wasteful number, since it uses less digits than its factorization.

20131130212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46172430 (or 46172428 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20131130212 its reverse (21203113102), we get a palindrome (41334243314).

The spelling of 20131130212 in words is "twenty billion, one hundred thirty-one million, one hundred thirty thousand, two hundred twelve".