121530166 has 8 divisors (see below), whose sum is σ = 185734944. Its totient is φ = 59618520.

The previous prime is 121530151. The next prime is 121530173. The reversal of 121530166 is 661035121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121530166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573150 + ... + 573361.

It is an arithmetic number, because the mean of its divisors is an integer number (23216868).

Almost surely, 2^121530166 is an apocalyptic number.

121530166 is a deficient number, since it is larger than the sum of its proper divisors (64204778).

121530166 is a wasteful number, since it uses less digits than its factorization.

121530166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146566.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 121530166 is about 11024.0721151487. The cubic root of 121530166 is about 495.3300740400.

Adding to 121530166 its reverse (661035121), we get a palindrome (782565287).

The spelling of 121530166 in words is "one hundred twenty-one million, five hundred thirty thousand, one hundred sixty-six".