15520410121 has 8 divisors (see below), whose sum is σ = 16024736000. Its totient is φ = 15016313520.

The previous prime is 15520410041. The next prime is 15520410173. The reversal of 15520410121 is 12101402551.

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 15520410121 - 2⁹ = 15520409609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15520410092 and 15520410101.

It is not an unprimeable number, because it can be changed into a prime (15520410421) 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, 85990 + ... + 196048.

It is an arithmetic number, because the mean of its divisors is an integer number (2003092000).

Almost surely, 2^15520410121 is an apocalyptic number.

It is an amenable number.

15520410121 is a deficient number, since it is larger than the sum of its proper divisors (504325879).

15520410121 is a wasteful number, since it uses less digits than its factorization.

15520410121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114639.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 15520410121 its reverse (12101402551), we get a palindrome (27621812672).

The spelling of 15520410121 in words is "fifteen billion, five hundred twenty million, four hundred ten thousand, one hundred twenty-one".