130121521 has 8 divisors (see below), whose sum is σ = 137473920. Its totient is φ = 122960208.

The previous prime is 130121513. The next prime is 130121531. The reversal of 130121521 is 125121031.

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

It is a cyclic number.

It is not a de Polignac number, because 130121521 - 2³ = 130121513 is a prime.

It is a super-2 number, since 2×130121521² = 33863220454706882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 130121495 and 130121504.

It is not an unprimeable number, because it can be changed into a prime (130121501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46371 + ... + 49096.

It is an arithmetic number, because the mean of its divisors is an integer number (17184240).

Almost surely, 2^130121521 is an apocalyptic number.

It is an amenable number.

130121521 is a deficient number, since it is larger than the sum of its proper divisors (7352399).

130121521 is an equidigital number, since it uses as much as digits as its factorization.

130121521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95543.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 130121521 is about 11407.0820545835. The cubic root of 130121521 is about 506.7374990903.

Adding to 130121521 its reverse (125121031), we get a palindrome (255242552).

It can be divided in two parts, 1301 and 21521, that added together give a palindrome (22822).

The spelling of 130121521 in words is "one hundred thirty million, one hundred twenty-one thousand, five hundred twenty-one".