12151757881 has 4 divisors (see below), whose sum is σ = 12151991952. Its totient is φ = 12151523812.

The previous prime is 12151757869. The next prime is 12151757887. The reversal of 12151757881 is 18875715121.

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.

It is a cyclic number.

It is not a de Polignac number, because 12151757881 - 2⁷ = 12151757753 is a prime.

It is a super-2 number, since 2×12151757881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12151757887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451 + ... + 155896.

It is an arithmetic number, because the mean of its divisors is an integer number (3037997988).

Almost surely, 2^12151757881 is an apocalyptic number.

It is an amenable number.

12151757881 is a deficient number, since it is larger than the sum of its proper divisors (234071).

12151757881 is an equidigital number, since it uses as much as digits as its factorization.

12151757881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234070.

The product of its digits is 156800, while the sum is 46.

The spelling of 12151757881 in words is "twelve billion, one hundred fifty-one million, seven hundred fifty-seven thousand, eight hundred eighty-one".