12151278511225 has 24 divisors (see below), whose sum is σ = 18126418475840. Its totient is φ = 7893762880320.

The previous prime is 12151278511223. The next prime is 12151278511231. The reversal of 12151278511225 is 52211587215121.

It is not a de Polignac number, because 12151278511225 - 2¹ = 12151278511223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12151278511223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1827256602 + ... + 1827263251.

Almost surely, 2^{12151278511225} is an apocalyptic number.

It is an amenable number.

12151278511225 is a deficient number, since it is larger than the sum of its proper divisors (5975139964615).

12151278511225 is a wasteful number, since it uses less digits than its factorization.

12151278511225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654519889 (or 3654519884 counting only the distinct ones).

The product of its digits is 112000, while the sum is 43.

The spelling of 12151278511225 in words is "twelve trillion, one hundred fifty-one billion, two hundred seventy-eight million, five hundred eleven thousand, two hundred twenty-five".