201212121121211 has 8 divisors (see below), whose sum is σ = 201389986749648. Its totient is φ = 201034265796000.

The previous prime is 201212121121169. The next prime is 201212121121229. The reversal of 201212121121211 is 112121121212102.

It is a happy number.

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 201212121121211 - 2³⁴ = 201194941252027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201212121127211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36764921 + ... + 41881781.

It is an arithmetic number, because the mean of its divisors is an integer number (25173748343706).

Almost surely, 2^{201212121121211} is an apocalyptic number.

201212121121211 is a deficient number, since it is larger than the sum of its proper divisors (177865628437).

201212121121211 is a wasteful number, since it uses less digits than its factorization.

201212121121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151613.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 201212121121211 its reverse (112121121212102), we get a palindrome (313333242333313).

The spelling of 201212121121211 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".