121505273 has 16 divisors (see below), whose sum is σ = 133883280. Its totient is φ = 109756416.

The previous prime is 121505269. The next prime is 121505287. The reversal of 121505273 is 372505121.

It can be written as a sum of positive squares in 8 ways, for example, as 1317904 + 120187369 = 1148^2 + 10963^2 .

It is not a de Polignac number, because 121505273 - 2² = 121505269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121502273) 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, 94511 + ... + 95787.

It is an arithmetic number, because the mean of its divisors is an integer number (8367705).

Almost surely, 2^121505273 is an apocalyptic number.

It is an amenable number.

121505273 is a deficient number, since it is larger than the sum of its proper divisors (12378007).

121505273 is a wasteful number, since it uses less digits than its factorization.

121505273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 121505273 is about 11022.9430280665. The cubic root of 121505273 is about 495.2962522768.

The spelling of 121505273 in words is "one hundred twenty-one million, five hundred five thousand, two hundred seventy-three".