20121200312 has 16 divisors (see below), whose sum is σ = 38073373800. Its totient is φ = 9968300640.

The previous prime is 20121200311. The next prime is 20121200347. The reversal of 20121200312 is 21300212102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121200311) 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 3 ways as a sum of consecutive naturals, for example, 11536514 + ... + 11538257.

Almost surely, 2^20121200312 is an apocalyptic number.

It is an amenable number.

20121200312 is a deficient number, since it is larger than the sum of its proper divisors (17952173488).

20121200312 is a wasteful number, since it uses less digits than its factorization.

20121200312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23074886 (or 23074882 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20121200312 its reverse (21300212102), we get a palindrome (41421412414).

The spelling of 20121200312 in words is "twenty billion, one hundred twenty-one million, two hundred thousand, three hundred twelve".