21321312001012 has 12 divisors (see below), whose sum is σ = 37319046953440. Its totient is φ = 10658727157176.

The previous prime is 21321312000971. The next prime is 21321312001019. The reversal of 21321312001012 is 21010021312312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321312001019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482185962 + ... + 482230177.

Almost surely, 2^{21321312001012} is an apocalyptic number.

It is an amenable number.

21321312001012 is a deficient number, since it is larger than the sum of its proper divisors (15997734952428).

21321312001012 is a wasteful number, since it uses less digits than its factorization.

21321312001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964421670 (or 964421668 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21321312001012 its reverse (21010021312312), we get a palindrome (42331333313324).

The spelling of 21321312001012 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred twelve million, one thousand, twelve".