1311012252251 has 8 divisors (see below), whose sum is σ = 1413023305680. Its totient is φ = 1209167478432.

The previous prime is 1311012252241. The next prime is 1311012252259. The reversal of 1311012252251 is 1522522101131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311012252251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311012252251.

It is not an unprimeable number, because it can be changed into a prime (1311012252259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41553521 + ... + 41585058.

It is an arithmetic number, because the mean of its divisors is an integer number (176627913210).

Almost surely, 2^{1311012252251} is an apocalyptic number.

1311012252251 is a deficient number, since it is larger than the sum of its proper divisors (102011053429).

1311012252251 is a wasteful number, since it uses less digits than its factorization.

1311012252251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83139805.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 1311012252251 its reverse (1522522101131), we get a palindrome (2833534353382).

The spelling of 1311012252251 in words is "one trillion, three hundred eleven billion, twelve million, two hundred fifty-two thousand, two hundred fifty-one".