201212102005 has 8 divisors (see below), whose sum is σ = 249780540600. Its totient is φ = 155419002816.

The previous prime is 201212101939. The next prime is 201212102011. The reversal of 201212102005 is 500201212102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 62607045796 + 138605056209 = 250214^2 + 372297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201212102005 - 2²⁵ = 201178547573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201212102005.

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, 693834690 + ... + 693834979.

It is an arithmetic number, because the mean of its divisors is an integer number (31222567575).

Almost surely, 2^201212102005 is an apocalyptic number.

It is an amenable number.

201212102005 is a deficient number, since it is larger than the sum of its proper divisors (48568438595).

201212102005 is a wasteful number, since it uses less digits than its factorization.

201212102005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387669703.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 201212102005 its reverse (500201212102), we get a palindrome (701413314107).

The spelling of 201212102005 in words is "two hundred one billion, two hundred twelve million, one hundred two thousand, five".