201210121212 has 96 divisors (see below), whose sum is σ = 485304680448. Its totient is φ = 64843200000.

The previous prime is 201210121169. The next prime is 201210121213. The reversal of 201210121212 is 212121012102.

It is a junction number, because it is equal to n+sod(n) for n = 201210121191 and 201210121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201210121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25462462 + ... + 25470362.

It is an arithmetic number, because the mean of its divisors is an integer number (5055257088).

Almost surely, 2^201210121212 is an apocalyptic number.

It is an amenable number.

201210121212 is an abundant number, since it is smaller than the sum of its proper divisors (284094559236).

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

201210121212 is a wasteful number, since it uses less digits than its factorization.

201210121212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8411 (or 8409 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201210121212 its reverse (212121012102), we get a palindrome (413331133314).

The spelling of 201210121212 in words is "two hundred one billion, two hundred ten million, one hundred twenty-one thousand, two hundred twelve".