21031130233312 has 96 divisors (see below), whose sum is σ = 41804494405632. Its totient is φ = 10414428401664.

The previous prime is 21031130233307. The next prime is 21031130233349. The reversal of 21031130233312 is 21333203113012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9813872113 + ... + 9813874255.

It is an arithmetic number, because the mean of its divisors is an integer number (435463483392).

Almost surely, 2^{21031130233312} is an apocalyptic number.

It is an amenable number.

21031130233312 is a deficient number, since it is larger than the sum of its proper divisors (20773364172320).

21031130233312 is a wasteful number, since it uses less digits than its factorization.

21031130233312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400 (or 5392 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21031130233312 its reverse (21333203113012), we get a palindrome (42364333346324).

The spelling of 21031130233312 in words is "twenty-one trillion, thirty-one billion, one hundred thirty million, two hundred thirty-three thousand, three hundred twelve".