203111302212 has 72 divisors (see below), whose sum is σ = 631901839296. Its totient is φ = 53567815104.

The previous prime is 203111302187. The next prime is 203111302217. The reversal of 203111302212 is 212203111302.

203111302212 is a `hidden beast` number, since 2 + 0 + 311 + 130 + 221 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (203111302217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30996618 + ... + 31003169.

Almost surely, 2^203111302212 is an apocalyptic number.

It is an amenable number.

203111302212 is an abundant number, since it is smaller than the sum of its proper divisors (428790537084).

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

203111302212 is a wasteful number, since it uses less digits than its factorization.

203111302212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61999817 (or 61999812 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 203111302212 its reverse (212203111302), we get a palindrome (415314413514).

The spelling of 203111302212 in words is "two hundred three billion, one hundred eleven million, three hundred two thousand, two hundred twelve".