2111550165101 has 8 divisors (see below), whose sum is σ = 2274720030744. Its totient is φ = 1948486432320.

The previous prime is 2111550165073. The next prime is 2111550165107. The reversal of 2111550165101 is 1015610551112.

It can be written as a sum of positive squares in 4 ways, for example, as 475721955076 + 1635828210025 = 689726^2 + 1278995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111550165101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111550165107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26491886 + ... + 26571471.

It is an arithmetic number, because the mean of its divisors is an integer number (284340003843).

Almost surely, 2^{2111550165101} is an apocalyptic number.

It is an amenable number.

2111550165101 is a deficient number, since it is larger than the sum of its proper divisors (163169865643).

2111550165101 is a wasteful number, since it uses less digits than its factorization.

2111550165101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53066431.

The product of its (nonzero) digits is 1500, while the sum is 29.

The spelling of 2111550165101 in words is "two trillion, one hundred eleven billion, five hundred fifty million, one hundred sixty-five thousand, one hundred one".