1211122121701 has 2 divisors, whose sum is σ = 1211122121702. Its totient is φ = 1211122121700.

The previous prime is 1211122121681. The next prime is 1211122121749. The reversal of 1211122121701 is 1071212211121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760916013025 + 450206108676 = 872305^2 + 670974^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211122121701 - 2⁵ = 1211122121669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211122191701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605561060850 + 605561060851.

It is an arithmetic number, because the mean of its divisors is an integer number (605561060851).

Almost surely, 2^{1211122121701} is an apocalyptic number.

It is an amenable number.

1211122121701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211122121701 is an equidigital number, since it uses as much as digits as its factorization.

1211122121701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 22.

Adding to 1211122121701 its reverse (1071212211121), we get a palindrome (2282334332822).

The spelling of 1211122121701 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, seven hundred one".