121500530 has 32 divisors (see below), whose sum is σ = 232651440. Its totient is φ = 45527040.

The previous prime is 121500527. The next prime is 121500541. The reversal of 121500530 is 35005121.

121500530 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 8 ways, for example, as 55517401 + 65983129 = 7451^2 + 8123^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 121500499 and 121500508.

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, 37370 + ... + 40490.

Almost surely, 2^121500530 is an apocalyptic number.

121500530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121500530 is a deficient number, since it is larger than the sum of its proper divisors (111150910).

121500530 is a wasteful number, since it uses less digits than its factorization.

121500530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 121500530 is about 11022.7278837863. The cubic root of 121500530 is about 495.2898075066.

Adding to 121500530 its reverse (35005121), we get a palindrome (156505651).

The spelling of 121500530 in words is "one hundred twenty-one million, five hundred thousand, five hundred thirty".