203311310212 has 48 divisors (see below), whose sum is σ = 387853567920. Its totient is φ = 92862001152.

The previous prime is 203311310207. The next prime is 203311310243. The reversal of 203311310212 is 212013113302.

It can be written as a sum of positive squares in 8 ways, for example, as 125907167556 + 77404142656 = 354834^2 + 278216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 203311310212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930258 + ... + 1127830.

It is an arithmetic number, because the mean of its divisors is an integer number (8080282665).

Almost surely, 2^203311310212 is an apocalyptic number.

It is an amenable number.

203311310212 is a deficient number, since it is larger than the sum of its proper divisors (184542257708).

203311310212 is a wasteful number, since it uses less digits than its factorization.

203311310212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198040 (or 198038 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 203311310212 its reverse (212013113302), we get a palindrome (415324423514).

The spelling of 203311310212 in words is "two hundred three billion, three hundred eleven million, three hundred ten thousand, two hundred twelve".