203112311312 has 40 divisors (see below), whose sum is σ = 414999852000. Its totient is φ = 96035127552.

The previous prime is 203112311263. The next prime is 203112311351. The reversal of 203112311312 is 213113211302.

It is a happy number.

It is a super-2 number, since 2×203112311312² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444437 + ... + 777012.

It is an arithmetic number, because the mean of its divisors is an integer number (10374996300).

Almost surely, 2^203112311312 is an apocalyptic number.

It is an amenable number.

203112311312 is an abundant number, since it is smaller than the sum of its proper divisors (211887540688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203112311312 is a wasteful number, since it uses less digits than its factorization.

203112311312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222023 (or 1222017 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 203112311312 its reverse (213113211302), we get a palindrome (416225522614).

The spelling of 203112311312 in words is "two hundred three billion, one hundred twelve million, three hundred eleven thousand, three hundred twelve".