15121171201 has 4 divisors (see below), whose sum is σ = 15406476372. Its totient is φ = 14835866032.

The previous prime is 15121171193. The next prime is 15121171231. The reversal of 15121171201 is 10217112151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8149756176 + 6971415025 = 90276^2 + 83495^2 .

It is a cyclic number.

It is not a de Polignac number, because 15121171201 - 2³ = 15121171193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15121171231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142652506 + ... + 142652611.

It is an arithmetic number, because the mean of its divisors is an integer number (3851619093).

Almost surely, 2^15121171201 is an apocalyptic number.

It is an amenable number.

15121171201 is a deficient number, since it is larger than the sum of its proper divisors (285305171).

15121171201 is an equidigital number, since it uses as much as digits as its factorization.

15121171201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285305170.

The product of its (nonzero) digits is 140, while the sum is 22.

Adding to 15121171201 its reverse (10217112151), we get a palindrome (25338283352).

The spelling of 15121171201 in words is "fifteen billion, one hundred twenty-one million, one hundred seventy-one thousand, two hundred one".