1001111121169 has 2 divisors, whose sum is σ = 1001111121170. Its totient is φ = 1001111121168.

The previous prime is 1001111121121. The next prime is 1001111121223. The reversal of 1001111121169 is 9611211111001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546682784400 + 454428336769 = 739380^2 + 674113^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001111121169 - 2¹¹ = 1001111119121 is a prime.

It is a super-2 number, since 2×1001111121169² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1001111121869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500555560584 + 500555560585.

It is an arithmetic number, because the mean of its divisors is an integer number (500555560585).

Almost surely, 2^{1001111121169} is an apocalyptic number.

It is an amenable number.

1001111121169 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001111121169 is an equidigital number, since it uses as much as digits as its factorization.

1001111121169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 25.

The spelling of 1001111121169 in words is "one trillion, one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred sixty-nine".