121765727073 has 16 divisors (see below), whose sum is σ = 162914938560. Its totient is φ = 80897309376.

The previous prime is 121765727051. The next prime is 121765727087. The reversal of 121765727073 is 370727567121.

It is not a de Polignac number, because 121765727073 - 2¹³ = 121765718881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121765725073) 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, 974886 + ... + 1092672.

It is an arithmetic number, because the mean of its divisors is an integer number (10182183660).

Almost surely, 2^121765727073 is an apocalyptic number.

It is an amenable number.

121765727073 is a deficient number, since it is larger than the sum of its proper divisors (41149211487).

121765727073 is a wasteful number, since it uses less digits than its factorization.

121765727073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118976.

The product of its (nonzero) digits is 864360, while the sum is 48.

The spelling of 121765727073 in words is "one hundred twenty-one billion, seven hundred sixty-five million, seven hundred twenty-seven thousand, seventy-three".