12151712257 has 4 divisors (see below), whose sum is σ = 12791276080. Its totient is φ = 11512148436.

The previous prime is 12151712233. The next prime is 12151712273. The reversal of 12151712257 is 75221715121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75221715121 = 7 ⋅10745959303.

It is a cyclic number.

It is not a de Polignac number, because 12151712257 - 2¹⁵ = 12151679489 is a prime.

It is a super-3 number, since 3×12151712257³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12151712207) 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, 319781883 + ... + 319781920.

It is an arithmetic number, because the mean of its divisors is an integer number (3197819020).

Almost surely, 2^12151712257 is an apocalyptic number.

It is an amenable number.

12151712257 is a deficient number, since it is larger than the sum of its proper divisors (639563823).

12151712257 is an equidigital number, since it uses as much as digits as its factorization.

12151712257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639563822.

The product of its digits is 9800, while the sum is 34.

The spelling of 12151712257 in words is "twelve billion, one hundred fifty-one million, seven hundred twelve thousand, two hundred fifty-seven".