2115565165111 has 4 divisors (see below), whose sum is σ = 2115628937424. Its totient is φ = 2115501392800.

The previous prime is 2115565165069. The next prime is 2115565165139. The reversal of 2115565165111 is 1115615655112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2115565165111 - 2¹⁹ = 2115564640823 is a prime.

It is a super-2 number, since 2×2115565165111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115565162111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31836370 + ... + 31902751.

It is an arithmetic number, because the mean of its divisors is an integer number (528907234356).

Almost surely, 2^{2115565165111} is an apocalyptic number.

2115565165111 is a deficient number, since it is larger than the sum of its proper divisors (63772313).

2115565165111 is an equidigital number, since it uses as much as digits as its factorization.

2115565165111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63772312.

The product of its digits is 45000, while the sum is 40.

The spelling of 2115565165111 in words is "two trillion, one hundred fifteen billion, five hundred sixty-five million, one hundred sixty-five thousand, one hundred eleven".