201211212002101 has 6 divisors (see below), whose sum is σ = 234062022124950. Its totient is φ = 172466753144616.

The previous prime is 201211212002083. The next prime is 201211212002147. The reversal of 201211212002101 is 101200212112102.

It can be written as a sum of positive squares in only one way, i.e., 190368219165201 + 10842992836900 = 13797399^2 + 3292870^2 .

It is not a de Polignac number, because 201211212002101 - 2⁹ = 201211212001589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211212002161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2053175632626 + ... + 2053175632723.

It is an arithmetic number, because the mean of its divisors is an integer number (39010337020825).

Almost surely, 2^{201211212002101} is an apocalyptic number.

It is an amenable number.

201211212002101 is a deficient number, since it is larger than the sum of its proper divisors (32850810122849).

201211212002101 is an equidigital number, since it uses as much as digits as its factorization.

201211212002101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106351265363 (or 4106351265356 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201211212002101 its reverse (101200212112102), we get a palindrome (302411424114203).

The spelling of 201211212002101 in words is "two hundred one trillion, two hundred eleven billion, two hundred twelve million, two thousand, one hundred one".