21232333231212 has 24 divisors (see below), whose sum is σ = 49607212222512. Its totient is φ = 7068144217600.

The previous prime is 21232333231171. The next prime is 21232333231217. The reversal of 21232333231212 is 21213233323212.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21232333231212.

It is not an unprimeable number, because it can be changed into a prime (21232333231217) 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, 1162514589 + ... + 1162532852.

It is an arithmetic number, because the mean of its divisors is an integer number (2066967175938).

Almost surely, 2^{21232333231212} is an apocalyptic number.

It is an amenable number.

21232333231212 is an abundant number, since it is smaller than the sum of its proper divisors (28374878991300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21232333231212 is a wasteful number, since it uses less digits than its factorization.

21232333231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325048209 (or 2325048207 counting only the distinct ones).

The product of its digits is 15552, while the sum is 30.

Adding to 21232333231212 its reverse (21213233323212), we get a palindrome (42445566554424).

The spelling of 21232333231212 in words is "twenty-one trillion, two hundred thirty-two billion, three hundred thirty-three million, two hundred thirty-one thousand, two hundred twelve".