20101111011169 has 2 divisors, whose sum is σ = 20101111011170. Its totient is φ = 20101111011168.

The previous prime is 20101111011143. The next prime is 20101111011181. The reversal of 20101111011169 is 96111011110102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11264998057569 + 8836112953600 = 3356337^2 + 2972560^2 .

It is a cyclic number.

It is not a de Polignac number, because 20101111011169 - 2²⁷ = 20100976793441 is a prime.

It is a super-2 number, since 2×20101111011169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20101111011269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050555505584 + 10050555505585.

It is an arithmetic number, because the mean of its divisors is an integer number (10050555505585).

Almost surely, 2^{20101111011169} is an apocalyptic number.

It is an amenable number.

20101111011169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101111011169 is an equidigital number, since it uses as much as digits as its factorization.

20101111011169 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 20101111011169 in words is "twenty trillion, one hundred one billion, one hundred eleven million, eleven thousand, one hundred sixty-nine".