121841137617 has 16 divisors (see below), whose sum is σ = 166042249920. Its totient is φ = 79443396032.

The previous prime is 121841137591. The next prime is 121841137619. The reversal of 121841137617 is 716731148121.

It is a cyclic number.

It is not a de Polignac number, because 121841137617 - 2¹¹ = 121841135569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121841137619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158267 + ... + 1259072.

It is an arithmetic number, because the mean of its divisors is an integer number (10377640620).

Almost surely, 2^121841137617 is an apocalyptic number.

It is an amenable number.

121841137617 is a deficient number, since it is larger than the sum of its proper divisors (44201112303).

121841137617 is a wasteful number, since it uses less digits than its factorization.

121841137617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2417712.

The product of its digits is 56448, while the sum is 42.

The spelling of 121841137617 in words is "one hundred twenty-one billion, eight hundred forty-one million, one hundred thirty-seven thousand, six hundred seventeen".