21210230323312 has 40 divisors (see below), whose sum is σ = 42517267894800. Its totient is φ = 10238124782592.

The previous prime is 21210230323309. The next prime is 21210230323313. The reversal of 21210230323312 is 21332303201212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210230323313) 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, 778264 + ... + 6559432.

It is an arithmetic number, because the mean of its divisors is an integer number (1062931697370).

Almost surely, 2^{21210230323312} is an apocalyptic number.

It is an amenable number.

21210230323312 is an abundant number, since it is smaller than the sum of its proper divisors (21307037571488).

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

21210230323312 is a wasteful number, since it uses less digits than its factorization.

21210230323312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5789113 (or 5789107 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21210230323312 its reverse (21332303201212), we get a palindrome (42542533524524).

The spelling of 21210230323312 in words is "twenty-one trillion, two hundred ten billion, two hundred thirty million, three hundred twenty-three thousand, three hundred twelve".