21212123303302 has 16 divisors (see below), whose sum is σ = 32846411664000. Its totient is φ = 10263357616320.

The previous prime is 21212123303299. The next prime is 21212123303309. The reversal of 21212123303302 is 20330332121212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212123303309) 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, 8429677 + ... + 10652872.

It is an arithmetic number, because the mean of its divisors is an integer number (2052900729000).

Almost surely, 2^{21212123303302} is an apocalyptic number.

21212123303302 is a deficient number, since it is larger than the sum of its proper divisors (11634288360698).

21212123303302 is a wasteful number, since it uses less digits than its factorization.

21212123303302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19100511.

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

Adding to 21212123303302 its reverse (20330332121212), we get a palindrome (41542455424514).

The spelling of 21212123303302 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty-three million, three hundred three thousand, three hundred two".