121545046765771 has 16 divisors (see below), whose sum is σ = 123900676314688. Its totient is φ = 119208188851200.

The previous prime is 121545046765763. The next prime is 121545046765789. The reversal of 121545046765771 is 177567640545121.

It is a cyclic number.

It is not a de Polignac number, because 121545046765771 - 2³ = 121545046765763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121545046765721) 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, 167721010 + ... + 168444136.

It is an arithmetic number, because the mean of its divisors is an integer number (7743792269668).

Almost surely, 2^{121545046765771} is an apocalyptic number.

121545046765771 is a deficient number, since it is larger than the sum of its proper divisors (2355629548917).

121545046765771 is a wasteful number, since it uses less digits than its factorization.

121545046765771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736102.

The product of its (nonzero) digits is 49392000, while the sum is 61.

The spelling of 121545046765771 in words is "one hundred twenty-one trillion, five hundred forty-five billion, forty-six million, seven hundred sixty-five thousand, seven hundred seventy-one".