12251788281 has 48 divisors (see below), whose sum is σ = 19195053696. Its totient is φ = 7509604608.

The previous prime is 12251788249. The next prime is 12251788319. The reversal of 12251788281 is 18288715221.

12251788281 is a `hidden beast` number, since 122 + 517 + 8 + 8 + 2 + 8 + 1 = 666.

It is not a de Polignac number, because 12251788281 - 2⁵ = 12251788249 is a prime.

It is a super-2 number, since 2×12251788281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12251738281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 626061 + ... + 645333.

It is an arithmetic number, because the mean of its divisors is an integer number (399896952).

Almost surely, 2^12251788281 is an apocalyptic number.

It is an amenable number.

12251788281 is a deficient number, since it is larger than the sum of its proper divisors (6943265415).

12251788281 is a wasteful number, since it uses less digits than its factorization.

12251788281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19422 (or 19419 counting only the distinct ones).

The product of its digits is 143360, while the sum is 45.

The spelling of 12251788281 in words is "twelve billion, two hundred fifty-one million, seven hundred eighty-eight thousand, two hundred eighty-one".