201212011001 has 2 divisors, whose sum is σ = 201212011002. Its totient is φ = 201212011000.

The previous prime is 201212010997. The next prime is 201212011019. The reversal of 201212011001 is 100110212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156164070976 + 45047940025 = 395176^2 + 212245^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212011001 - 2² = 201212010997 is a prime.

It is not a weakly prime, because it can be changed into another prime (201212011031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606005500 + 100606005501.

It is an arithmetic number, because the mean of its divisors is an integer number (100606005501).

Almost surely, 2^201212011001 is an apocalyptic number.

It is an amenable number.

201212011001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212011001 is an equidigital number, since it uses as much as digits as its factorization.

201212011001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201212011001 its reverse (100110212102), we get a palindrome (301322223103).

The spelling of 201212011001 in words is "two hundred one billion, two hundred twelve million, eleven thousand, one".