1211122021271 has 2 divisors, whose sum is σ = 1211122021272. Its totient is φ = 1211122021270.

The previous prime is 1211122021199. The next prime is 1211122021289. The reversal of 1211122021271 is 1721202211121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211122021271 - 2¹⁰ = 1211122020247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211122011271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605561010635 + 605561010636.

It is an arithmetic number, because the mean of its divisors is an integer number (605561010636).

Almost surely, 2^{1211122021271} is an apocalyptic number.

1211122021271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211122021271 is an equidigital number, since it uses as much as digits as its factorization.

1211122021271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 1211122021271 its reverse (1721202211121), we get a palindrome (2932324232392).

The spelling of 1211122021271 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, twenty-one thousand, two hundred seventy-one".