15530113121 has 8 divisors (see below), whose sum is σ = 16049186304. Its totient is φ = 15012171360.

The previous prime is 15530113099. The next prime is 15530113171. The reversal of 15530113121 is 12131103551.

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 15530113121 - 2²⁶ = 15463004257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15530113171) 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, 254900 + ... + 309893.

It is an arithmetic number, because the mean of its divisors is an integer number (2006148288).

Almost surely, 2^15530113121 is an apocalyptic number.

It is an amenable number.

15530113121 is a deficient number, since it is larger than the sum of its proper divisors (519073183).

15530113121 is an equidigital number, since it uses as much as digits as its factorization.

15530113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565711.

The product of its (nonzero) digits is 450, while the sum is 23.

Adding to 15530113121 its reverse (12131103551), we get a palindrome (27661216672).

The spelling of 15530113121 in words is "fifteen billion, five hundred thirty million, one hundred thirteen thousand, one hundred twenty-one".