21031203330012 has 12 divisors (see below), whose sum is σ = 49072807770056. Its totient is φ = 7010401110000.

The previous prime is 21031203329993. The next prime is 21031203330017. The reversal of 21031203330012 is 21003330213012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031203330017) 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, 876300138739 + ... + 876300138762.

Almost surely, 2^{21031203330012} is an apocalyptic number.

It is an amenable number.

21031203330012 is an abundant number, since it is smaller than the sum of its proper divisors (28041604440044).

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

21031203330012 is a wasteful number, since it uses less digits than its factorization.

21031203330012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752600277508 (or 1752600277506 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21031203330012 its reverse (21003330213012), we get a palindrome (42034533543024).

The spelling of 21031203330012 in words is "twenty-one trillion, thirty-one billion, two hundred three million, three hundred thirty thousand, twelve".