1311641021525 has 12 divisors (see below), whose sum is σ = 1712036702400. Its totient is φ = 994085826480.

The previous prime is 1311641021497. The next prime is 1311641021659. The reversal of 1311641021525 is 5251201461131.

It is not a de Polignac number, because 1311641021525 - 2⁸ = 1311641021269 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1311641021491 and 1311641021500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1380674285 + ... + 1380675234.

It is an arithmetic number, because the mean of its divisors is an integer number (142669725200).

Almost surely, 2^{1311641021525} is an apocalyptic number.

It is an amenable number.

1311641021525 is a deficient number, since it is larger than the sum of its proper divisors (400395680875).

1311641021525 is a wasteful number, since it uses less digits than its factorization.

1311641021525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761349548 (or 2761349543 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 1311641021525 its reverse (5251201461131), we get a palindrome (6562842482656).

The spelling of 1311641021525 in words is "one trillion, three hundred eleven billion, six hundred forty-one million, twenty-one thousand, five hundred twenty-five".