1191217135038 has 32 divisors (see below), whose sum is σ = 2722923306240. Its totient is φ = 340330092480.

The previous prime is 1191217135013. The next prime is 1191217135039. The reversal of 1191217135038 is 8305317121911.

It is a super-2 number, since 2×1191217135038² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191217135039) 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 15 ways as a sum of consecutive naturals, for example, 94218 + ... + 1546386.

It is an arithmetic number, because the mean of its divisors is an integer number (85091353320).

Almost surely, 2^{1191217135038} is an apocalyptic number.

1191217135038 is an abundant number, since it is smaller than the sum of its proper divisors (1531706171202).

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

1191217135038 is a wasteful number, since it uses less digits than its factorization.

1191217135038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471712.

The product of its (nonzero) digits is 45360, while the sum is 42.

The spelling of 1191217135038 in words is "one trillion, one hundred ninety-one billion, two hundred seventeen million, one hundred thirty-five thousand, thirty-eight".