21010313313212 has 12 divisors (see below), whose sum is σ = 36768275314680. Its totient is φ = 10505091794736.

The previous prime is 21010313313203. The next prime is 21010313313217. The reversal of 21010313313212 is 21231331301012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010313313217) 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, 15482963 + ... + 16785194.

It is an arithmetic number, because the mean of its divisors is an integer number (3064022942890).

Almost surely, 2^{21010313313212} is an apocalyptic number.

It is an amenable number.

21010313313212 is a deficient number, since it is larger than the sum of its proper divisors (15757962001468).

21010313313212 is a wasteful number, since it uses less digits than its factorization.

21010313313212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32430940 (or 32430938 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21010313313212 its reverse (21231331301012), we get a palindrome (42241644614224).

The spelling of 21010313313212 in words is "twenty-one trillion, ten billion, three hundred thirteen million, three hundred thirteen thousand, two hundred twelve".