1251343331312 has 20 divisors (see below), whose sum is σ = 2424693009120. Its totient is φ = 625616103168.

The previous prime is 1251343331311. The next prime is 1251343331333. The reversal of 1251343331312 is 2131333431521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251343331311) 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, 3286553 + ... + 3647480.

It is an arithmetic number, because the mean of its divisors is an integer number (121234650456).

Almost surely, 2^{1251343331312} is an apocalyptic number.

It is an amenable number.

1251343331312 is a deficient number, since it is larger than the sum of its proper divisors (1173349677808).

1251343331312 is a wasteful number, since it uses less digits than its factorization.

1251343331312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945320 (or 6945314 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

Adding to 1251343331312 its reverse (2131333431521), we get a palindrome (3382676762833).

The spelling of 1251343331312 in words is "one trillion, two hundred fifty-one billion, three hundred forty-three million, three hundred thirty-one thousand, three hundred twelve".