1211020101169 has 2 divisors, whose sum is σ = 1211020101170. Its totient is φ = 1211020101168.

The previous prime is 1211020101139. The next prime is 1211020101227. The reversal of 1211020101169 is 9611010201121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 608088040000 + 602932061169 = 779800^2 + 776487^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211020101169 - 2³¹ = 1208872617521 is a prime.

It is a super-2 number, since 2×1211020101169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211020101139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605510050584 + 605510050585.

It is an arithmetic number, because the mean of its divisors is an integer number (605510050585).

Almost surely, 2^{1211020101169} is an apocalyptic number.

It is an amenable number.

1211020101169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211020101169 is an equidigital number, since it uses as much as digits as its factorization.

1211020101169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 25.

The spelling of 1211020101169 in words is "one trillion, two hundred eleven billion, twenty million, one hundred one thousand, one hundred sixty-nine".