15203042121 has 8 divisors (see below), whose sum is σ = 20479699744. Its totient is φ = 10030872960.

The previous prime is 15203042087. The next prime is 15203042219. The reversal of 15203042121 is 12124030251.

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

It is not a de Polignac number, because 15203042121 - 2⁷ = 15203041993 is a prime.

It is a super-2 number, since 2×15203042121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15203042821) 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 7 ways as a sum of consecutive naturals, for example, 26121775 + ... + 26122356.

It is an arithmetic number, because the mean of its divisors is an integer number (2559962468).

Almost surely, 2^15203042121 is an apocalyptic number.

It is an amenable number.

15203042121 is a deficient number, since it is larger than the sum of its proper divisors (5276657623).

15203042121 is an equidigital number, since it uses as much as digits as its factorization.

15203042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52244231.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 15203042121 its reverse (12124030251), we get a palindrome (27327072372).

The spelling of 15203042121 in words is "fifteen billion, two hundred three million, forty-two thousand, one hundred twenty-one".