1211100170213 has 2 divisors, whose sum is σ = 1211100170214. Its totient is φ = 1211100170212.

The previous prime is 1211100170207. The next prime is 1211100170227. The reversal of 1211100170213 is 3120710011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 759968984644 + 451131185569 = 871762^2 + 671663^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211100170213 - 2¹⁴ = 1211100153829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211100170233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605550085106 + 605550085107.

It is an arithmetic number, because the mean of its divisors is an integer number (605550085107).

Almost surely, 2^{1211100170213} is an apocalyptic number.

It is an amenable number.

1211100170213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211100170213 is an equidigital number, since it uses as much as digits as its factorization.

1211100170213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 1211100170213 its reverse (3120710011121), we get a palindrome (4331810181334).

The spelling of 1211100170213 in words is "one trillion, two hundred eleven billion, one hundred million, one hundred seventy thousand, two hundred thirteen".