10665151611021 has 8 divisors (see below), whose sum is σ = 15800224608960. Its totient is φ = 7110101073996.

The previous prime is 10665151610999. The next prime is 10665151611071. The reversal of 10665151611021 is 12011615156601.

10665151611021 is a `hidden beast` number, since 1 + 0 + 6 + 6 + 5 + 1 + 516 + 110 + 21 = 666.

It is not a de Polignac number, because 10665151611021 - 2⁵ = 10665151610989 is a prime.

It is a super-2 number, since 2×10665151611021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10665151611071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197502807585 + ... + 197502807638.

It is an arithmetic number, because the mean of its divisors is an integer number (1975028076120).

Almost surely, 2^{10665151611021} is an apocalyptic number.

It is an amenable number.

10665151611021 is a deficient number, since it is larger than the sum of its proper divisors (5135072997939).

10665151611021 is an equidigital number, since it uses as much as digits as its factorization.

10665151611021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395005615232 (or 395005615226 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 36.

Adding to 10665151611021 its reverse (12011615156601), we get a palindrome (22676766767622).

The spelling of 10665151611021 in words is "ten trillion, six hundred sixty-five billion, one hundred fifty-one million, six hundred eleven thousand, twenty-one".