201212211121201 has 16 divisors (see below), whose sum is σ = 230079223376640. Its totient is φ = 172375825962240.

The previous prime is 201212211121199. The next prime is 201212211121267. The reversal of 201212211121201 is 102121112212102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 201212211121201 - 2¹ = 201212211121199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201212211101201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98189181 + ... + 100217461.

It is an arithmetic number, because the mean of its divisors is an integer number (14379951461040).

Almost surely, 2^{201212211121201} is an apocalyptic number.

It is an amenable number.

201212211121201 is a deficient number, since it is larger than the sum of its proper divisors (28867012255439).

201212211121201 is a wasteful number, since it uses less digits than its factorization.

201212211121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035824.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201212211121201 its reverse (102121112212102), we get a palindrome (303333323333303).

The spelling of 201212211121201 in words is "two hundred one trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-one thousand, two hundred one".