121751560617 has 16 divisors (see below), whose sum is σ = 163052697600. Its totient is φ = 80809398272.

The previous prime is 121751560583. The next prime is 121751560631. The reversal of 121751560617 is 716065157121.

It is a cyclic number.

It is not a de Polignac number, because 121751560617 - 2²⁰ = 121750512041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121751560657) 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 15 ways as a sum of consecutive naturals, for example, 1462168 + ... + 1543190.

It is an arithmetic number, because the mean of its divisors is an integer number (10190793600).

Almost surely, 2^121751560617 is an apocalyptic number.

It is an amenable number.

121751560617 is a deficient number, since it is larger than the sum of its proper divisors (41301136983).

121751560617 is a wasteful number, since it uses less digits than its factorization.

121751560617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83232.

The product of its (nonzero) digits is 88200, while the sum is 42.

The spelling of 121751560617 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred sixty thousand, six hundred seventeen".