15120120505251 has 8 divisors (see below), whose sum is σ = 20160194316480. Its totient is φ = 10080063515432.

The previous prime is 15120120505211. The next prime is 15120120505253. The reversal of 15120120505251 is 15250502102151.

15120120505251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 15120120505251 - 2⁶ = 15120120505187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15120120505253) 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, 1932525 + ... + 5828798.

It is an arithmetic number, because the mean of its divisors is an integer number (2520024289560).

Almost surely, 2^{15120120505251} is an apocalyptic number.

15120120505251 is a deficient number, since it is larger than the sum of its proper divisors (5040073811229).

15120120505251 is an equidigital number, since it uses as much as digits as its factorization.

15120120505251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410705.

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 15120120505251 in words is "fifteen trillion, one hundred twenty billion, one hundred twenty million, five hundred five thousand, two hundred fifty-one".