121530610 has 8 divisors (see below), whose sum is σ = 218755116. Its totient is φ = 48612240.

The previous prime is 121530587. The next prime is 121530611. The reversal of 121530610 is 16035121.

It can be written as a sum of positive squares in 2 ways, for example, as 103408561 + 18122049 = 10169^2 + 4257^2 .

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

It is not an unprimeable number, because it can be changed into a prime (121530611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6076521 + ... + 6076540.

Almost surely, 2^121530610 is an apocalyptic number.

121530610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121530610 is a deficient number, since it is larger than the sum of its proper divisors (97224506).

121530610 is a wasteful number, since it uses less digits than its factorization.

121530610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12153068.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 121530610 is about 11024.0922528796. The cubic root of 121530610 is about 495.3306772545.

Adding to 121530610 its reverse (16035121), we get a palindrome (137565731).

The spelling of 121530610 in words is "one hundred twenty-one million, five hundred thirty thousand, six hundred ten".