21233122312 has 64 divisors (see below), whose sum is σ = 41351310000. Its totient is φ = 10213969920.

The previous prime is 21233122301. The next prime is 21233122319. The reversal of 21233122312 is 21322133212.

It can be written as a sum of positive squares in 8 ways, for example, as 1252168996 + 19980953316 = 35386^2 + 141354^2 .

It is not an unprimeable number, because it can be changed into a prime (21233122319) 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 15 ways as a sum of consecutive naturals, for example, 14858014 + ... + 14859442.

Almost surely, 2^21233122312 is an apocalyptic number.

It is an amenable number.

21233122312 is a deficient number, since it is larger than the sum of its proper divisors (20118187688).

21233122312 is a wasteful number, since it uses less digits than its factorization.

21233122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074 (or 2070 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 21233122312 its reverse (21322133212), we get a palindrome (42555255524).

The spelling of 21233122312 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-two thousand, three hundred twelve".