20121312310 has 64 divisors (see below), whose sum is σ = 39945830400. Its totient is φ = 7236673920.

The previous prime is 20121312293. The next prime is 20121312313. The reversal of 20121312310 is 1321312102.

It is a super-2 number, since 2×20121312310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121312313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4873467 + ... + 4877593.

It is an arithmetic number, because the mean of its divisors is an integer number (624153600).

Almost surely, 2^20121312310 is an apocalyptic number.

20121312310 is a deficient number, since it is larger than the sum of its proper divisors (19824518090).

20121312310 is a wasteful number, since it uses less digits than its factorization.

20121312310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4621.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20121312310 its reverse (1321312102), we get a palindrome (21442624412).

The spelling of 20121312310 in words is "twenty billion, one hundred twenty-one million, three hundred twelve thousand, three hundred ten".