121530505 has 16 divisors (see below), whose sum is σ = 152515584. Its totient is φ = 92790720.

The previous prime is 121530499. The next prime is 121530523. The reversal of 121530505 is 505035121.

It is not a de Polignac number, because 121530505 - 2¹¹ = 121528457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68935 + ... + 70675.

It is an arithmetic number, because the mean of its divisors is an integer number (9532224).

Almost surely, 2^121530505 is an apocalyptic number.

It is an amenable number.

121530505 is a deficient number, since it is larger than the sum of its proper divisors (30985079).

121530505 is a wasteful number, since it uses less digits than its factorization.

121530505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 121530505 is about 11024.0874905817. The cubic root of 121530505 is about 495.3305346026.

Adding to 121530505 its reverse (505035121), we get a palindrome (626565626).

The spelling of 121530505 in words is "one hundred twenty-one million, five hundred thirty thousand, five hundred five".