212303121312 has 24 divisors (see below), whose sum is σ = 557295693696.
Its totient is φ = 70767707072.
The previous prime is 212303121311. The next prime is 212303121353. The reversal of 212303121312 is 213121303212.
It is a tau number, because it is divible by the number of its divisors (24).
It is not an unprimeable number, because it can be changed into a prime (212303121311) 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, 1105745328 + ... + 1105745519.
It is an arithmetic number, because the mean of its divisors is an integer number (23220653904).
Almost surely, 2212303121312 is an apocalyptic number.
It is an amenable number.
212303121312 is an abundant number, since it is smaller than the sum of its proper divisors (344992572384).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212303121312 is a wasteful number, since it uses less digits than its factorization.
212303121312 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2211490860 (or 2211490852 counting only the distinct ones).
The product of its (nonzero) digits is 432, while the sum is 21.
Adding to 212303121312 its reverse (213121303212), we get a palindrome (425424424524).
The spelling of 212303121312 in words is "two hundred twelve billion, three hundred three million, one hundred twenty-one thousand, three hundred twelve".