1101100001238 has 24 divisors (see below), whose sum is σ = 2385919668600. Its totient is φ = 367002103104.

The previous prime is 1101100001237. The next prime is 1101100001257. The reversal of 1101100001238 is 8321000011011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1101100001238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101100001237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2384643 + ... + 2808686.

It is an arithmetic number, because the mean of its divisors is an integer number (99413319525).

Almost surely, 2^{1101100001238} is an apocalyptic number.

1101100001238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1101100001238 is an abundant number, since it is smaller than the sum of its proper divisors (1284819667362).

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

1101100001238 is a wasteful number, since it uses less digits than its factorization.

1101100001238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5205116 (or 5205113 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1101100001238 its reverse (8321000011011), we get a palindrome (9422100012249).

The spelling of 1101100001238 in words is "one trillion, one hundred one billion, one hundred million, one thousand, two hundred thirty-eight".