201212121122010 has 48 divisors (see below), whose sum is σ = 537290745059016. Its totient is φ = 52206388182144.

The previous prime is 201212121121997. The next prime is 201212121122053. The reversal of 201212121122010 is 10221121212102.

201212121122010 is a `hidden beast` number, since 20 + 1 + 212 + 1 + 211 + 220 + 1 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 152490366992601 + 48721754129409 = 12348699^2 + 6980097^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30212026869 + ... + 30212033528.

Almost surely, 2^{201212121122010} is an apocalyptic number.

201212121122010 is an abundant number, since it is smaller than the sum of its proper divisors (336078623937006).

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

201212121122010 is a wasteful number, since it uses less digits than its factorization.

201212121122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60424060447 (or 60424060444 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201212121122010 its reverse (10221121212102), we get a palindrome (211433242334112).

The spelling of 201212121122010 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, ten".