15201121 has 8 divisors (see below), whose sum is σ = 17232320. Its totient is φ = 13293072.

The previous prime is 15201113. The next prime is 15201127. The reversal of 15201121 is 12110251.

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

It is not a de Polignac number, because 15201121 - 2³ = 15201113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15201127) 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, 30525 + ... + 31018.

It is an arithmetic number, because the mean of its divisors is an integer number (2154040).

Almost surely, 2^15201121 is an apocalyptic number.

It is an amenable number.

15201121 is a deficient number, since it is larger than the sum of its proper divisors (2031199).

15201121 is a wasteful number, since it uses less digits than its factorization.

15201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61575.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 15201121 is about 3898.8615004896. The cubic root of 15201121 is about 247.7185553745.

Adding to 15201121 its reverse (12110251), we get a palindrome (27311372).

The spelling of 15201121 in words is "fifteen million, two hundred one thousand, one hundred twenty-one".