20133131212 has 24 divisors (see below), whose sum is σ = 37311309504. Its totient is φ = 9472941312.

The previous prime is 20133131209. The next prime is 20133131219. The reversal of 20133131212 is 21213133102.

It is a self number, because there is not a number n which added to its sum of digits gives 20133131212.

It is not an unprimeable number, because it can be changed into a prime (20133131219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506278 + ... + 544594.

It is an arithmetic number, because the mean of its divisors is an integer number (1554637896).

Almost surely, 2^20133131212 is an apocalyptic number.

It is an amenable number.

20133131212 is a deficient number, since it is larger than the sum of its proper divisors (17178178292).

20133131212 is a wasteful number, since it uses less digits than its factorization.

20133131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46065 (or 46063 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20133131212 its reverse (21213133102), we get a palindrome (41346264314).

The spelling of 20133131212 in words is "twenty billion, one hundred thirty-three million, one hundred thirty-one thousand, two hundred twelve".