21233131112 has 32 divisors (see below), whose sum is σ = 40567612800. Its totient is φ = 10416993984.

The previous prime is 21233131097. The next prime is 21233131141. The reversal of 21233131112 is 21113133212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28388 + ... + 208019.

It is an arithmetic number, because the mean of its divisors is an integer number (1267737900).

Almost surely, 2^21233131112 is an apocalyptic number.

It is an amenable number.

21233131112 is a deficient number, since it is larger than the sum of its proper divisors (19334481688).

21233131112 is a wasteful number, since it uses less digits than its factorization.

21233131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236625 (or 236621 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 21233131112 its reverse (21113133212), we get a palindrome (42346264324).

The spelling of 21233131112 in words is "twenty-one billion, two hundred thirty-three million, one hundred thirty-one thousand, one hundred twelve".