20211131212 has 12 divisors (see below), whose sum is σ = 37231031320. Its totient is φ = 9573693696.

The previous prime is 20211131183. The next prime is 20211131219. The reversal of 20211131212 is 21213111202.

It is not an unprimeable number, because it can be changed into a prime (20211131219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132967893 + ... + 132968044.

Almost surely, 2^20211131212 is an apocalyptic number.

It is an amenable number.

20211131212 is a deficient number, since it is larger than the sum of its proper divisors (17019900108).

20211131212 is a wasteful number, since it uses less digits than its factorization.

20211131212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265935960 (or 265935958 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20211131212 its reverse (21213111202), we get a palindrome (41424242414).

The spelling of 20211131212 in words is "twenty billion, two hundred eleven million, one hundred thirty-one thousand, two hundred twelve".