121775237127647 has 8 divisors (see below), whose sum is σ = 127118855485440. Its totient is φ = 116435705672440.

The previous prime is 121775237127613. The next prime is 121775237127659. The reversal of 121775237127647 is 746721732577121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121775237127647 - 2²⁴ = 121775220350431 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121775237127647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121775237127667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1021664747 + ... + 1021783932.

It is an arithmetic number, because the mean of its divisors is an integer number (15889856935680).

Almost surely, 2^{121775237127647} is an apocalyptic number.

121775237127647 is a deficient number, since it is larger than the sum of its proper divisors (5343618357793).

121775237127647 is a wasteful number, since it uses less digits than its factorization.

121775237127647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043451293.

The product of its digits is 48404160, while the sum is 62.

The spelling of 121775237127647 in words is "one hundred twenty-one trillion, seven hundred seventy-five billion, two hundred thirty-seven million, one hundred twenty-seven thousand, six hundred forty-seven".