121547728695 has 16 divisors (see below), whose sum is σ = 198999073152. Its totient is φ = 63317886240.

The previous prime is 121547728691. The next prime is 121547728697. The reversal of 121547728695 is 596827745121.

It is not a de Polignac number, because 121547728695 - 2² = 121547728691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121547728691) 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, 94222401 + ... + 94223690.

It is an arithmetic number, because the mean of its divisors is an integer number (12437442072).

Almost surely, 2^121547728695 is an apocalyptic number.

121547728695 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121547728695 is a deficient number, since it is larger than the sum of its proper divisors (77451344457).

121547728695 is a wasteful number, since it uses less digits than its factorization.

121547728695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188446142.

The product of its digits is 8467200, while the sum is 57.

The spelling of 121547728695 in words is "one hundred twenty-one billion, five hundred forty-seven million, seven hundred twenty-eight thousand, six hundred ninety-five".