1157165618121 has 12 divisors (see below), whose sum is σ = 1671472593648. Its totient is φ = 771438601464.

The previous prime is 1157165618093. The next prime is 1157165618131. The reversal of 1157165618121 is 1218165617511.

1157165618121 is a `hidden beast` number, since 1 + 1 + 5 + 7 + 1 + 6 + 5 + 618 + 1 + 21 = 666.

It is not a de Polignac number, because 1157165618121 - 2¹¹ = 1157165616073 is a prime.

It is a super-2 number, since 2×1157165618121² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1157165618131) 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 11 ways as a sum of consecutive naturals, for example, 1412086 + ... + 2075648.

It is an arithmetic number, because the mean of its divisors is an integer number (139289382804).

Almost surely, 2^{1157165618121} is an apocalyptic number.

It is an amenable number.

1157165618121 is a deficient number, since it is larger than the sum of its proper divisors (514306975527).

1157165618121 is a wasteful number, since it uses less digits than its factorization.

1157165618121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857332 (or 857329 counting only the distinct ones).

The product of its digits is 100800, while the sum is 45.

The spelling of 1157165618121 in words is "one trillion, one hundred fifty-seven billion, one hundred sixty-five million, six hundred eighteen thousand, one hundred twenty-one".