203121304343312 has 10 divisors (see below), whose sum is σ = 393547527165198. Its totient is φ = 101560652171648.

The previous prime is 203121304343297. The next prime is 203121304343327. The reversal of 203121304343312 is 213343403121302.

It is an interprime number because it is at equal distance from previous prime (203121304343297) and next prime (203121304343327).

It can be written as a sum of positive squares in only one way, i.e., 200862704140816 + 2258600202496 = 14172604^2 + 1502864^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347540760713 + ... + 6347540760744.

Almost surely, 2^{203121304343312} is an apocalyptic number.

It is an amenable number.

203121304343312 is a deficient number, since it is larger than the sum of its proper divisors (190426222821886).

203121304343312 is a wasteful number, since it uses less digits than its factorization.

203121304343312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12695081521465 (or 12695081521459 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 203121304343312 its reverse (213343403121302), we get a palindrome (416464707464614).

The spelling of 203121304343312 in words is "two hundred three trillion, one hundred twenty-one billion, three hundred four million, three hundred forty-three thousand, three hundred twelve".