203121120212 has 12 divisors (see below), whose sum is σ = 356414944116. Its totient is φ = 101288279040.

The previous prime is 203121120109. The next prime is 203121120217. The reversal of 203121120212 is 212021121302.

It can be written as a sum of positive squares in 2 ways, for example, as 62643081796 + 140478038416 = 250286^2 + 374804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203121120217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68068589 + ... + 68071572.

It is an arithmetic number, because the mean of its divisors is an integer number (29701245343).

Almost surely, 2^203121120212 is an apocalyptic number.

It is an amenable number.

203121120212 is a deficient number, since it is larger than the sum of its proper divisors (153293823904).

203121120212 is a wasteful number, since it uses less digits than its factorization.

203121120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136140538 (or 136140536 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 203121120212 its reverse (212021121302), we get a palindrome (415142241514).

The spelling of 203121120212 in words is "two hundred three billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twelve".