121125530 has 16 divisors (see below), whose sum is σ = 218262600. Its totient is φ = 48397632.

The previous prime is 121125479. The next prime is 121125553. The reversal of 121125530 is 35521121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 120582361 + 543169 = 10981^2 + 737^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3896 + ... + 16044.

Almost surely, 2^121125530 is an apocalyptic number.

121125530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121125530 is a deficient number, since it is larger than the sum of its proper divisors (97137070).

121125530 is a wasteful number, since it uses less digits than its factorization.

121125530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13153.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 121125530 is about 11005.7044299763. The cubic root of 121125530 is about 494.7797271820.

Adding to 121125530 its reverse (35521121), we get a palindrome (156646651).

The spelling of 121125530 in words is "one hundred twenty-one million, one hundred twenty-five thousand, five hundred thirty".