121249486161 has 12 divisors (see below), whose sum is σ = 175144078980. Its totient is φ = 80830252800.

The previous prime is 121249486159. The next prime is 121249486249. The reversal of 121249486161 is 161684942121.

121249486161 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 4 + 9 + 486 + 161 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51101315136 + 70148171025 = 226056^2 + 264855^2 .

It is not a de Polignac number, because 121249486161 - 2¹ = 121249486159 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (121249486861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73261 + ... + 497861.

It is an arithmetic number, because the mean of its divisors is an integer number (14595339915).

Almost surely, 2^121249486161 is an apocalyptic number.

It is an amenable number.

121249486161 is a deficient number, since it is larger than the sum of its proper divisors (53894592819).

121249486161 is a wasteful number, since it uses less digits than its factorization.

121249486161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456336 (or 456333 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The spelling of 121249486161 in words is "one hundred twenty-one billion, two hundred forty-nine million, four hundred eighty-six thousand, one hundred sixty-one".