21312301212310 has 64 divisors (see below), whose sum is σ = 38668855680000. Its totient is φ = 8457016464000.

The previous prime is 21312301212299. The next prime is 21312301212317. The reversal of 21312301212310 is 1321210321312.

It is a super-2 number, since 2×21312301212310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312301212317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516774785 + ... + 1516788835.

It is an arithmetic number, because the mean of its divisors is an integer number (604200870000).

Almost surely, 2^{21312301212310} is an apocalyptic number.

21312301212310 is a deficient number, since it is larger than the sum of its proper divisors (17356554467690).

21312301212310 is a wasteful number, since it uses less digits than its factorization.

21312301212310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16237.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21312301212310 its reverse (1321210321312), we get a palindrome (22633511533622).

The spelling of 21312301212310 in words is "twenty-one trillion, three hundred twelve billion, three hundred one million, two hundred twelve thousand, three hundred ten".