1251343222125 has 32 divisors (see below), whose sum is σ = 2126538026496. Its totient is φ = 653183403200.

The previous prime is 1251343222111. The next prime is 1251343222189. The reversal of 1251343222125 is 5212223431521.

It is not a de Polignac number, because 1251343222125 - 2⁴ = 1251343222109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35481474 + ... + 35516723.

It is an arithmetic number, because the mean of its divisors is an integer number (66454313328).

Almost surely, 2^{1251343222125} is an apocalyptic number.

1251343222125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1251343222125 is a deficient number, since it is larger than the sum of its proper divisors (875194804371).

1251343222125 is an equidigital number, since it uses as much as digits as its factorization.

1251343222125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70998262 (or 70998252 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

Adding to 1251343222125 its reverse (5212223431521), we get a palindrome (6463566653646).

The spelling of 1251343222125 in words is "one trillion, two hundred fifty-one billion, three hundred forty-three million, two hundred twenty-two thousand, one hundred twenty-five".