1311102061236 has 72 divisors (see below), whose sum is σ = 3805750821600. Its totient is φ = 376392934080.

The previous prime is 1311102061229. The next prime is 1311102061267. The reversal of 1311102061236 is 6321602011131.

It is a happy number.

1311102061236 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 10 + 2 + 0 + 612 + 36 = 666.

It is a super-2 number, since 2×1311102061236² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87120471 + ... + 87135518.

It is an arithmetic number, because the mean of its divisors is an integer number (52857650300).

Almost surely, 2^{1311102061236} is an apocalyptic number.

It is an amenable number.

1311102061236 is an abundant number, since it is smaller than the sum of its proper divisors (2494648760364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311102061236 is a wasteful number, since it uses less digits than its factorization.

1311102061236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174256029 (or 174256024 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

Adding to 1311102061236 its reverse (6321602011131), we get a palindrome (7632704072367).

The spelling of 1311102061236 in words is "one trillion, three hundred eleven billion, one hundred two million, sixty-one thousand, two hundred thirty-six".