15042250121 has 4 divisors (see below), whose sum is σ = 15050660100. Its totient is φ = 15033840144.

The previous prime is 15042250103. The next prime is 15042250193. The reversal of 15042250121 is 12105224051.

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 11022690121 + 4019560000 = 104989^2 + 63400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15042250121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15042250721) 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, 4202306 + ... + 4205883.

It is an arithmetic number, because the mean of its divisors is an integer number (3762665025).

Almost surely, 2^15042250121 is an apocalyptic number.

It is an amenable number.

15042250121 is a deficient number, since it is larger than the sum of its proper divisors (8409979).

15042250121 is an equidigital number, since it uses as much as digits as its factorization.

15042250121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409978.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 15042250121 its reverse (12105224051), we get a palindrome (27147474172).

The spelling of 15042250121 in words is "fifteen billion, forty-two million, two hundred fifty thousand, one hundred twenty-one".