15121120345 has 16 divisors (see below), whose sum is σ = 18938603520. Its totient is φ = 11568297664.

The previous prime is 15121120331. The next prime is 15121120361. The reversal of 15121120345 is 54302112151.

It is a cyclic number.

It is not a de Polignac number, because 15121120345 - 2⁹ = 15121119833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598152 + ... + 622918.

It is an arithmetic number, because the mean of its divisors is an integer number (1183662720).

Almost surely, 2^15121120345 is an apocalyptic number.

It is an amenable number.

15121120345 is a deficient number, since it is larger than the sum of its proper divisors (3817483175).

15121120345 is a wasteful number, since it uses less digits than its factorization.

15121120345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30104.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 15121120345 its reverse (54302112151), we get a palindrome (69423232496).

The spelling of 15121120345 in words is "fifteen billion, one hundred twenty-one million, one hundred twenty thousand, three hundred forty-five".