121988650474901 has 16 divisors (see below), whose sum is σ = 139504369155840. Its totient is φ = 104495131451520.

The previous prime is 121988650474877. The next prime is 121988650474909. The reversal of 121988650474901 is 109474056889121.

It is a cyclic number.

It is not a de Polignac number, because 121988650474901 - 2¹⁴ = 121988650458517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121988650474909) 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, 200623505 + ... + 201230633.

It is an arithmetic number, because the mean of its divisors is an integer number (8719023072240).

Almost surely, 2^{121988650474901} is an apocalyptic number.

It is an amenable number.

121988650474901 is a deficient number, since it is larger than the sum of its proper divisors (17515718680939).

121988650474901 is a wasteful number, since it uses less digits than its factorization.

121988650474901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625364.

The product of its (nonzero) digits is 34836480, while the sum is 65.

The spelling of 121988650474901 in words is "one hundred twenty-one trillion, nine hundred eighty-eight billion, six hundred fifty million, four hundred seventy-four thousand, nine hundred one".