203121212212 has 24 divisors (see below), whose sum is σ = 359176761216. Its totient is φ = 100500728928.

The previous prime is 203121212159. The next prime is 203121212323. The reversal of 203121212212 is 212212121302.

203121212212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 203121212212.

It is a congruent number.

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, 382878 + ... + 743530.

It is an arithmetic number, because the mean of its divisors is an integer number (14965698384).

Almost surely, 2^203121212212 is an apocalyptic number.

It is an amenable number.

203121212212 is a deficient number, since it is larger than the sum of its proper divisors (156055549004).

203121212212 is a wasteful number, since it uses less digits than its factorization.

203121212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362127 (or 362125 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 203121212212 its reverse (212212121302), we get a palindrome (415333333514).

The spelling of 203121212212 in words is "two hundred three billion, one hundred twenty-one million, two hundred twelve thousand, two hundred twelve".