1065011371261 has 4 divisors (see below), whose sum is σ = 1065372028252. Its totient is φ = 1064650714272.

The previous prime is 1065011371253. The next prime is 1065011371271. The reversal of 1065011371261 is 1621731105601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 919644558361 + 145366812900 = 958981^2 + 381270^2 .

It is a cyclic number.

It is not a de Polignac number, because 1065011371261 - 2³ = 1065011371253 is a prime.

It is a super-2 number, since 2×1065011371261² (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 (1065011371211) 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, 180324066 + ... + 180329971.

It is an arithmetic number, because the mean of its divisors is an integer number (266343007063).

Almost surely, 2^{1065011371261} is an apocalyptic number.

It is an amenable number.

1065011371261 is a deficient number, since it is larger than the sum of its proper divisors (360656991).

1065011371261 is an equidigital number, since it uses as much as digits as its factorization.

1065011371261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360656990.

The product of its (nonzero) digits is 7560, while the sum is 34.

Adding to 1065011371261 its reverse (1621731105601), we get a palindrome (2686742476862).

The spelling of 1065011371261 in words is "one trillion, sixty-five billion, eleven million, three hundred seventy-one thousand, two hundred sixty-one".