121523130 has 24 divisors (see below), whose sum is σ = 315960372. Its totient is φ = 32406144.

The previous prime is 121523063. The next prime is 121523167. The reversal of 121523130 is 31325121.

121523130 is a `hidden beast` number, since 12 + 1 + 523 + 130 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 118526769 + 2996361 = 10887^2 + 1731^2 .

It is a super-2 number, since 2×121523130² = 29535742249993800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 675039 + ... + 675218.

Almost surely, 2^121523130 is an apocalyptic number.

121523130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121523130 is an abundant number, since it is smaller than the sum of its proper divisors (194437242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121523130 is a wasteful number, since it uses less digits than its factorization.

121523130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350270 (or 1350267 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 121523130 is about 11023.7529907015. The cubic root of 121523130 is about 495.3205147957.

Adding to 121523130 its reverse (31325121), we get a palindrome (152848251).

The spelling of 121523130 in words is "one hundred twenty-one million, five hundred twenty-three thousand, one hundred thirty".