1311226165425 has 24 divisors (see below), whose sum is σ = 2364975194400. Its totient is φ = 635746019200.

The previous prime is 1311226165357. The next prime is 1311226165429. The reversal of 1311226165425 is 5245616221131.

It is not a de Polignac number, because 1311226165425 - 2²⁰ = 1311225116849 is a prime.

It is a super-3 number, since 3×1311226165425³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311226165429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 794681700 + ... + 794683349.

It is an arithmetic number, because the mean of its divisors is an integer number (98540633100).

Almost surely, 2^{1311226165425} is an apocalyptic number.

1311226165425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311226165425 is a deficient number, since it is larger than the sum of its proper divisors (1053749028975).

1311226165425 is a wasteful number, since it uses less digits than its factorization.

1311226165425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589365073 (or 1589365068 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The spelling of 1311226165425 in words is "one trillion, three hundred eleven billion, two hundred twenty-six million, one hundred sixty-five thousand, four hundred twenty-five".