20133123212 has 12 divisors (see below), whose sum is σ = 36447895680. Its totient is φ = 9719438736.

The previous prime is 20133123203. The next prime is 20133123217. The reversal of 20133123212 is 21232133102.

It is not an unprimeable number, because it can be changed into a prime (20133123217) 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, 86780588 + ... + 86780819.

It is an arithmetic number, because the mean of its divisors is an integer number (3037324640).

Almost surely, 2^20133123212 is an apocalyptic number.

It is an amenable number.

20133123212 is a deficient number, since it is larger than the sum of its proper divisors (16314772468).

20133123212 is a wasteful number, since it uses less digits than its factorization.

20133123212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173561440 (or 173561438 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20133123212 its reverse (21232133102), we get a palindrome (41365256314).

The spelling of 20133123212 in words is "twenty billion, one hundred thirty-three million, one hundred twenty-three thousand, two hundred twelve".